Pack your hand in: give up
Never chuck yer and in: never give up
Sources:  GS, ST

Paddies: people of Irish stock. In Lancashire, paddy came to mean ill temper.  Paddy's lantern was a jocular Lancashire term for the moon, as was Paddy's grapes for potato.
Source: ISA

Paddy Kelly: a dock police officer
Sources: LS1, Shaw ST

Paddy Kelly(rhyming): the belly
Source: LS3

Paddy Pics(obsolete): another name for the old Coliseum Movie Theatre
Source: TIM

Paddywack: an indigestible ligament of meat, used by children as something upon which to chew. Spiegl suggests that the song with the chorus "knick-knack paddywack, give a dog a bone" probably comes from this. Stan Kelly-Bootle thinks that the usage goes back to as early as 1740. I note that in early nineteenth century Lancashire "paxwax" referred to the tendon in a neck of veal.  That could be the root of "paddy wack."
Sources: LS2, DSL

Paddy's Wigwam: the Roman Catholic cathedral in Liverpool
Source: LS2

Paddy's Market: a place where all sorts of second hand stuff can be bought, and virtually everything else in God's plenty. Originally this was St. Martin's Market, which was established in 1862 on Banastre Street. The name "Paddy's Market" came from the Irish sailors and famine immigrants, who went to it for inexpensive buys.  After this site was badly damaged in World War II bombing it was demolished, and the the New Market of Great Homer Street became the "Paddy's Market" we have today.
Sources: LS2, SL

PAFO: abbreviation used by hospital casualty officers. It means "pissed and fell over."
Source: LS4

painted girl, a: a false or disingenuous woman, but these days it's just a teasing remark
Source: SL

Pallyass: a promiscuous woman, perhaps from the word "palliasse," of French derivation, which meant straw mattress.
Sources: LS3, SCHUR

Palm Sunday: the ship is about to dock and hands are out for gratuities.
Source: LS3

Panda: police car painted black and white
Source: LS4

panel the: list of National Health Service Doctors for a given district
Source: GYW, SCHUR

Para: paranoid.  One phrase for a psychopath is "crazy paving."
Source: SL

Paradise Street:  along with Lime Street, this was the street famous for its actual and semi-mythical prostitutes in the nineteenth century.  It is referred to in song and shanty.
Source: SL

Parapets: sidewalks
Source: Shaw II

Parlatic. Ee's parlatic. He is heavily intoxicated. Spiegl thinks the word in the background is paralytic.
Source: LS1

Parny: rain
Source: LS3

parrot nose: another scouse teasing insult, liberally offered.
Source: SL

parrot: a red and white marble for playing.
Source: LS3

Pasha: a strong-smelling brand of Turkish cigarette
Source: SL

passer(pickpocket argot): the person who receives the wallet from the dipper (or dip), who has just stolen it.
Source: ZCAR

passin'-out parade: assembly of relatives at the bedside of a sick or dying person
Source: LS2

passion killers: women's long underwear
Source: SL

Pat'n'Mick(rhyming): sick
Source: GYW

Pay, giving the: speaking emphatically
Source: GS

Pea wack: pea soup, often soup from cheap meat.
Sources: LS1, SHAW 1

pearler, to do a: to fall off a boat into the water
Source: LI30

pee-the-beds:dandelions
Source: TIM

pee-wee: in headquarters parlance, a female police officer.
Source: SI

pegs: check points on a Bobbie's (a policeman's) round
Source: SI

Pen, the: labor pool for dock workers
Source: BLH

penny loosies: cigarettes bought one or several at a time
Source: SL

penny in the pound: earlier form of Government sponsored medical insurance in Britain, in return for a small investment on the part of the insured.
Source: SL

penny returns(obsolete): bus tickets, often available during the school holidays for anywhere in Liverpool and a penny for the return.
Source: SL

pigeon: yet another word for penis
Source: TMD

pig's belly(rhyming): television
Source: SL

pig sick, to be: to be very upset about something which has or has not happened, often because a wonderful opportunity has been lost.
Source: SL

piggy in the middle: the person who is merely the unsuspecting agent in some catastrophe, but not the one to blame.
Source: SI

pinkle twister: a male homosexual
Source: SI

pipe someone, to:  in police parlance, this is getting an identification or recognition of someone which may prove useful in the future.
Source: SI

Pisspot jerker: a ship's steward
Source: LS1

Pegs(rhyming): legs
The missing rhyming component is dolly pegs
Source: SL

Pen 'n' inks(rhyming): stinks
Source: LS3

Penguin-'ouse: a nunnery
Source: LS2

pennuth o' God (h)elp us: a trivial, insignificant person
Source: LS2

penny fades: apples well past their prime and therefore sold cheaply
Source: SL

Penny Monster(obsolete): a large mug of tea
Source: A

Penwiper: vagina. Minard says this is obsolete. The original word was pinny-wiper.
Source: LS3, Moloney

Pepper-corn rent: very low or token rent
Source: ML

Perve: any man who openly admires girls
Source: LS2

Peter: a safe
Source: LS4

Peter Hudson, a: a small glass which contains more than a quarter of a pint but less than a half pint of beer. Another name for it: a "Dodger." Hudson was a beer-engine maker who always strictly limited his morning consumption of ale to about two-thirds of a half-pint glass.
Source: LC

Petty: a lavatory(from the phrase "little house), loo, WC. Petty-pirate: a lavatory attendant.
Petty-poet: lavatory graffitist; Moloney suggests that a petty-grievance would be "no loo roll," no toilet paper.
Sources: LS2, SL, Moloney

piddle pot:  chamber pot.  To have "one foot in one's piddle pot"  is to be out of it or somehow missing the point.
Source: SL

piffy, to stand somewhere like a:  standing around like a dummy, while someone (usually a child) keeps you waiting.
Source: SL

Pig and Whistle: the crew bar on a ship
Source: LS3

Pig's melt: term of endearment for a child, probably from the iron and steel industry, where a pig is a bar of iron. Pig smelt would then be the source. But the analogy may be with "cow's melt," which can also be used as a term of endearment.
Source: SL, Moloney

Pigeon: an imaginary article for which children are sent on a fool's errand. To pigeon means to cheat, delude, or swindle.
Source: OED

Piggeries: Merseyside high-rise flats
Source: LS4

piggy: children's street game
Source: A

pilchard:  small sea fish, similar to herring, but smaller and rouder, and taken in great numbers off the coast of Cornwall and Devon.
Source: SL

Pill: a cigarette
Source: LS2

pillion, to ride: to ride behind on a horse, or in the rumble seat of a car
Source: SL

pink fits, to have: to be outraged
Source: GHTL

pillock: penis. As raillery, the word usually refers to a male. It comes from the now obsolete "pillcock," which meant penis.The term today is one of jovial address, comparable to "dickhead."
Sources: SL, ODS

Pine chips: a popular meal consisting of meat pie and fried potatoes. The original phrase was probably "pie and chips."
Source: LS2, Moloney

Pinky: small clay marble
Source: LS2

Pinny: pinafore, usually tied behind, rather than pinned in front
Source:  SL

Pins: legs
Source: LS3

pinta Fally's: a pint of Falstaff ale
Source: LS1

pip boss: a croupier in a casino
Source: FSDD

piss track: the male urinary system
Source: SL

pipe, to be going through the: to be traveling through the Mersey Tunnel
Source: LS3

piss, on ther: drinking with the sole intention of getting drunk
Source: LS2

piss on the chips(firewood) to: to sabotage some plan
Source: LS2

Piss artist: a habitual drinker
Source: Partridge

Piss up: a drinking bout, a party gotten up to do some heavy drinking
Source: DS

Piss is off, if: if nothing else is working out
"If the piss is off, gerrus a pinta lager."
Source: SL

Piss-prophet: a physician
Source: LS2

pit brow lass: girl hired to work above ground in a colliery, sorting coal by grade.  the phrase is now used metaphorically to describe an entry level or lowly position in a work-place.
Source: MV

pit pony: a young horse which would be used down in the mines
Source: SL

Pitch: the entire football(soccer) field
Source: GS

pitch and toss: See "toss skewl" on this list

Pitch Pat Pepper: a rope skipping game
Source: DBOC

Pivvy:  The Pavilion Theatre of sacred and distant memory
Source: SL

plain, clap, rolly fold:  children's ball game which involves throwing a ball up against a wall, doing actions while the ball is up, and then still catching it.  Actions: hip heel, toe, ground, whirley, baker-baker-baker, etc.  If the thrower gets  through the first round, he or she then has to do each action twice, and so on.
Source: DBOC

Plainees: detectives
Source: LS3

plantpot( as in "yer stupid effin plantpot"): a routine term of abuse
Source: SL

plastic, to be playing on: to be playing on an artificial surface, e.g., astroturf.
Source: GTH

Plastic Scouser: a Wirralite, someone from the Wirral area, or from Formby or Southport. These are often profiled as posh areas, compared to working-class Merseyside. Sometimes the full phrase for these relatively well off suburban scousers is "plackie scousers,"  and the taunt or dismissive remark is "Plackie Scousers, Mickey Mousers."
Source: SL

Plates of Meat (rhyming): feet. Plawts meaning feet is no doubt an offshoot of this.
Sources: LS3, SL

play little Harry, to(obsolete): to raise a fuss
Source: MEM

Playin' put 'n' take: sexual intercourse
Source: LS2

play-around, a: masturbation by a prostitute
Source: SI

play tic, to (with someone):  this is less harmless than it seems.  The full phrase is to play tic (or tick), i.e., tag, with hatchets.  Cf.  the lore about the Bootle area, where the residents are said to be so ferocious that they "play tick with hatchets."

pleats, to be in: to be laughing uncontrollably about something
Source: SL

plimsoles: a rubber-soled canvas shoe
Sources: OED,SL, LWAT

plonk: yet another word for penis
Source: SL

Plonky: a wine drinker. Plonk can also man cheap or diluted alcohol.
Source: LS1

Plum in one's mouth, to talk with: to have no trace of Scouse in one's accent, perhaps to be hewing to Received Pronunciation and "school driven" usages.
Source: SL

Plums: testicles, as in "hold your plums," or get ready for something spectacular or unexpected. The phrase was a standby line in a popular quiz game on Radio Merseyside.
Source: SL

Plus-fours: wide knickerbockers, as worn by golfers. The plus four may refer to the four inch increase in length to achieve the overhang. Scousers often deliberately say "plus fours" when they are referring to "petits fours."
Source: DS, Moloney

plushbums: rich people
Source:A

Plymouth Sound, a: a pound (rhyming)
Source: LS1 LS3

poach, to be on the:  to be searching for some desired item, or looking for an opportunity
Source: SL

Pobs: Bread and hot milk or any similarly insipid meal.  The Lancashire term for this is pobbies, probably coming from the Welsh "pobi," meaning to bake.
Sources: LS2, GLD

Poes: chamber pots (probably a shortening of  pot de chambre.
Source: SL

pokies: poker machines, usually found in hotels or casinos
Source: SL

pole: chamber pot, perhaps another version of po, for pot de chambre
Source:A, IHBY

Pole-squatter: a prostitute
Source: LS2

police clothing: clothing distributed early last century by the police to the very poor, usually stamped as such, so that they could not be pawned
Sources: A, LWAT,GU

Polish eggs: the equivalent of a wooden nickel, which would be a sign that the recipient has been had.
Source: SL

Pommies: Australians
Perhaps from POHM, Prisoner of Her Majesty, on the jackets of the earlier immigrants?  Much earlier, the word referred to a diet of potatoes, out of the French "pommes de terre."
Sources: SL, Moloney

Poncy: over-posh, effete. There is rhyming in the background with "nonce," and today the word can mean gay(homosexual).
Source: ANS, Moloney

Ponefract teacakes(Pontefract, actually): a popular local treat.
Source: SL, L8

Pong: an unpleasant smell
Source: LS2

Pongo: a soldier or a marine(military slang). Pongo was the dog in the Punch and Judy skits who wore a cap similar to that later worn by the military. Pong meaning stink may be part of the history of there.
Sources: MOORE, DS

Ponko: an old shawl or worn-out blanket. Spiegl thinks this is derived from "poncho."
Source: LS2

pony, a: twenty-five pounds
Source: LS1, LS3

Pony and Float(rhyming): overcoat
Source: LS3

Pony and trap(rhyming): faeces
The rhyming component should be obvious
Source: LS3

Poofter(or poof): an effeminate male
Source: LS2

Poop-pusher: a laxative, usually a strong one
Source: LS2

Poor Man's Blessing: vagina
Source: LS3

Poove (or poof): pansy; derogatory term for a homosexual
Source:ANS

pop, to: to pawn something.  This term was long  popular in the North as well as in London
Source: MEM

Pop one's clogs, to: be amazed, surprised, enough to jump out of one's shoes; it can also mean to drop dead.
Sources: SL, Moloney

Pop shop: hock or pawn shop
Source: SL, Partridge

Pope's phone: a measure of Vat 69 whisky.
Source: LS1

Pope's Corner: a part of Woolton which contains several convents and other Roman Catholic establishments.
Source: LS3

Popped: pawned
Source: SL

popper, a(obsolete): someone designated to pawn something for you.  Other terms for that: "bundle women," and "runners."
Source: MEM

Pork sword: penis
Source: LS3

Porky pies(Rhyming): lies
Source: SL

Porridge Gobblers: term for Scots
Source: SL

posser: see "dolly peg" on this list. The Lancashire term "poss" means to push down clothes in water, or to pull them in soak before washing them.  In Lancashire, a posser was a hollow cone-shaped instrument, having a smaller within it.  It was fitted to a long perpindicular handle and used in a laundry for "possing" clothes, when in the water.
Source: TWH

Postal, to go: to become beserk about some irritation. The usage can be found throughout the United States and Britain. Latest rival in the States: ballistic.
Source: SL

Postman's knock: an unskillful hunter's failure to hit anything as he fires at almost everything.
Another meaning for Postman's Knock: a teen-age kissing game, where the meaning of life is the luck of the draw. The theme of randomness may be driving both meanings.
Sources: DBOC, Moloney, ML

potato scallops: thick sliced potatoes in batter, deep fried
Source: TTR, SL

Potatoes and Point: just potatoes on a poor family's table. Everyone then can point to them and call them something else, for instance, chicken. This helped those who had only a little imagine much. Terry Eagleton's description of "potatoes and point" in Ireland is a bit different, but no doubt related:  if the person with the potato  wanted salt but there was no salt, he or she would  just point their potato at the dish in the middle of the table, where the salt was supposed to be, and imagine.
Source: SHAW I, TAI

Potcheen (potheen): An Irish word which in Liverpool can refer to any pain killing liquor
Source: LS2

potholing, to go:  to go exploring natural holes in the ground or to go caving.
Source: SL

Potman: person who is responsible for collecting the empty glasses in a pub
Source: SL

Potty chair: chair designed to aid elimination; training chair for a child to use a chamber pot. It can mean simply commode.
Sources: OED, Moloney

poverty-knock:  the effects of being poor. In Lancashire, "poverty knocker" was a sarcastic term for a hand-loom weaver.
Source: SL

Pox-doctor. Yer gorrup like a pox-docter's clerk. You are somewhat overdressed. The pox-doctor's clerk was the janitor at the Seaman's Dispensary.
Sources: LS1, Moloney

Pox-Palace, the: the Liverpool Museum of Anatomy, which featured an exhibition about venereal disease.
Source: LS2

poxy:  said of low grade, unhealthy looking produce
Source:  SL

Pozzy: jam or any preserve, especially the tinned variety issued to the Armed Forces. In World War I, the troops were issued the "Posy Brand" of condensed milk, which had a flower on the label..
Source: LS2

PP-nine someone, to: to hit someone using an improvised cosh made by concealing a PP-9 battery in the bottom of a sock
Source: LS4

prat:  sometimes the word refers to the buttocks, but more frequently it means fraudulent and hypocritical.
Source:  SL, OED

Pressie, a: a present
Source: ANS,SL

Preston Guild, once every: very rarely. The Preston Guild is a municipal celebration held since medieval times in Lancashire every twenty years.
Sources: LS1, LS3

Pricey buckos: derisory name given by Brutal street people to youths living in the Price Street area of Birkenhead
Source: LS2

prigs(obsolete): juvenile thieves
Source: MAH

Primus: the proprietary name of a make of pressure lamp or stove, usually one which burns paraffin.
Source: OED

Prinnie: Princess Park, in Liverpool
Source: SL

Prisoner's Base: childrens's game (called Relievo or Relalio) elsewhere.
A variant of this is Kick the Can, or Nurky, or denio
Source: Shaw III

Prod pairmit: a marriage certificate. One sense of this phrase is that it refers to a Protestant permit, which is obtained from a Registry rather than the Church, but I think that the sexual meaning of "prod" dominates the connotation now.
Sources: LS2, Moloney

Proddy-Dog. A Protestant.
Sources: LS1,LS2

Proey. Anyone gorra proey? Has anyone purchased a programme?
Source: LS1

Professor Messer. A didactic person.
Source: LS1

puck in the gob, a: a punch in the face
Source: SL

pucka-pu: chinese lottery game
Source: LMC

pudden in 'is kecks, to do a: to be very badly frightened
Source: LS2

Pudden Club, Ther: the condition of pregnancy
or simply: ther club
Source: LS2

Pudden pickin': living on immoral earnings
Source: LS2

Pudden: arse
Source: SL

Pudding Cake: another name for Wet Nellie, the dessert made out of stale cake.
Source: SL

Pudding eater: a pimp
Source: LS4

Puddled: very eccentric, insane.  A person may be said to be "Alka Seltzers," which is Liverpudlian for Alzheimer's.
Sources: DS, Moloney

puff, to be in one's: to be cavorting and running around naked

Puffing Billies: small freight trains which used to run under the Overhead Railway. In Lancashire, puffer or puffin' Billy was a child's name for a locomotive engine or a railway train.
Source: SL

Pug: a punch
Shaw says this is of Irish origin.  There is some interesting punning involved here. Pog means kiss in Irish. A punch is therefore an Irish kiss.  At one point, a French kiss meant a very non-sexual head-butt.
Sources: ML, Moloney

Pukka(from the Hindu): genuine or excellent.
Source: Schur

pull a bird, to: to have sex with a woman
Source: SL

pull a face, to: to show displeasure
Source: DBOC

pull the chain, to go and: to go to the lav, the reference being to the water tank overhead with the hanging chain.
Source: SL

Pull the lanyard, to: pass wind loudly. Spiegl thinks the term is an allusion to the nautical method of sounding audible warning on ships, but the allusion might as well be to artillery.
Source: LS2

Pull bacon, to: to make rude or obscene gestures, for instance when the Orange Lodges march by. In Lancashire, "Makkin-bacon"  meant putting thethumb to the nose and extending the fingers.  That action was sometimes accompanied by the words "bacon so thick."
Source: Shaw ST

Pullet-squeezer: a man with a fondness for young, sexually inexperienced girls.
Source: LS2

Pulling: getting a woman to have sex.  "Pulling chicks" is a commonly used phrase.  If one is prowling for women, one is "on the pull."
Sources:  ANS, Moloney

pummel: another word for posser, or dolly peg
Source: SL

Punk: male homosexual
Source: LS3

Punkawallah: Hindi for man who operated the fan with a rope. It's used derisively, as in "`es a punkwallah," and therefore has an unimportant role
Source: SL

punkgrafter: a beggar
Source: A

Punt, to take a: to make a bet
Source: SL

Punter: what prostitutes call their clients
Source: LS4

purple haze: form of packaged LSD
Source: L8

Purra zipper on it: please be silent.
Source: LS1

Pusher (now obsolete): a girl
Source: SHAW I

put the blockers on( something): to prohibit the use or practice of something other
Source: SL

Put ther boot in: to kick a fallen opponent in the head, ribs, or abdomen
Source: LS2

Put ther thumbs in: to try to gouge out an opponent's eyes
Source: LS2

Put ther nut in: to seize a person by the coat-lapels and butt him in the face.
Source: LS2