Kangol: brand name for the flat caps of workingmen in the North of Britain
Source: SL

Kavley: a sing-song or musical get-together. Cf.Irish "ceilidh"
Source: LS2

Kay-fisted: left-handed
Source: LS2

kaylied: drunk.  The word probably refers to a straight-sided wine bottle known as a kali bottle.
Source: LS2, SL

keckin'(Lancashire): spying
Source: SL

Kecks: Trousers. Dis pur a kecks is too tight. These trousers are too tight. Spiegl notes that "kicks" is eighteenth century thieves' slang for trousers. But I notice that in Lancashire "kecks" referred to the hollow stems of the common hemlock.  It was used by lads to shoot peas with, and also to make flute like instruments. Since "drainies" referred in the sixties and seventies to the way narrow and closely fitting  young men's pants resembled drain pipes, I would not rule out a connection between hemlock stems and trousers. Kecks can also mean underpants, usually female.
Sources: ANS, LS1, GLD

keepers(obsolete): a common name for the police who patrolled the various town markets
Source: GU

Keepin it in the family: incest
Sources: LS2,LS4

Keepin' douse: keeping watch.
Source:LS1

Keeping dixie: keeping watch in a criminal venture. The person who does this is the "specky man."
Source: LS4

Kekka:  to shut, as in "kekka mush": shut your mouth.
Source: LS3

Kelly's Barn: St. George's Hall
Source: SL

Ken: one's house
Source: LS3

Kenny: the Kensington area of Liverpool
Source: SL

Kent, Der Duke of (rhyming): the rent
Source: LS3

Kerb crawler: person who drives slowly up and down streets looking for prostitutes
Source: SL

Kettle scraped, to have one's: to go to confession
Source:  ML

Kettle: watch
This probably comes from the French "Quelle heure est-il?" Peter Moloney says that the connection might be with the proverb about the watched kettle never boiling.
Sources: LS3, Moloney

Kewins. Kewins ate wid a pin: Small shellfish (cockles,mussels,  winkles, periwinkles)
Shaw says that the name comes from an old fish-dealer named McKewan.
Sources: ML,LS1,LS2, SL

Kick-de-can: tin can baseball variant
Source: LS1

Kid: Are kid. My brother (possibly senior to the speaker, and of any age). Cf. "are kid" on this list.
Source: LS1

kid soup: a bath with carbolic in it
Source: SL

kidda: affectionate form of address between men or brothers.
Source: LS4

kidden (obsolete): a place which fronts as a lodging , but actually is a place where children are sexually abused
Sources: A, IHBY

King Edwards: an oval variety of potato with a white skin mottled with red.
Source: OED

king o' ther midden: a conceited person; one who puts on airs
Source: LS2

King Kong: derisory name for a weedy, undersized individual
Source: LS2

kipper: sad face, e.g., "he came 'ome each night wid a kipper like a fiddle."  Kipper can also mean the tie someone is wearing.
Sources: GYW, LS3, Moloney

kipper: cured herring
Sources: SL, OED

kipper season: lean times, probably from "kipper time," the period (May 3 to January 6) when salmon fishing was forbidden in the Thames, by act of Parliament.
Sources: OED, SL

Kipper: Cockney slang for female genitalia
Source: DS

kipwack: baby food
Source: LS3

Kirkby Kiss: head-butting the face, also known as "a mouthful of dandruff."
Source: LS4

Kithogue(Irish): lefthanded, clumsy
Source: ML

kiting (or kiter): check book and bank card frauds, also called "grafting."
Source: LS4

kitted up: equipped for theft. Similar to "tooled up" and "GEFT,", meaning going equipped for theft.
Source: LS4

knacker, to: to wear something out
Source: DS

Knacker's yard: said of a place that looks a complete mess. It can also refer to a slaughter yard for aging livestock, i.e., the "glue factory."
Sources: LS2, SCHUR

Knackered: fatigued, tuckered out.  In modern Dublin, a knacker is a member of the blue collar work force.
Source: SL, TAI

Knackers: testicles. The earlier meaning was castanets, from"knack." meaning to make a sharp crackling noise.
Sources: SL, ODS

knee-bender: a pious person
Source: LS2

Knee-trembler: sexual intercourse while standing
Source: LS1

knees up, Mother Brown: sometimes shouted at a drunken elderly woman
Source: LS2

Knees up, to have a: to have a lively social evening, usually with a great deal of dancing
Source: DS

Knife 'n' fork tea: substantial early-evening meal, or a meal in which the host has included some kind of meat.
Source: LS2

knit!: be quiet, i.e., attend to your knitting, sewing, etc.
Source: LS3

knob, a: a small lump of something, for instance a knob of butter or sugar.
Source: SL

Knock and Run: children's game
Source: LWAT

Knock off: stolen property, as in "selling knock off."
Source: LTB

Knock back, to: to turn down a sexual proposition. To be knocked back means to be turned down, rejected.
Sources: LS3, SL

knockers-up(obsolete): people with poles used to knock on windows, particularly those of dockers, so that they could get to their shifts on time.
Source: MV

knocked rotten: to be knocked silly or to be beaten into a stupor
Source: LS2

Knocker: door to door salesman
Source: ANS

Knocking shop: a brothel; derived from knock, meaning to have sex with.
Sources: LS2,ODS

Knocking to order: providing specific stolen goods on demand from a customer. Knock-off refers to stolen goods.
Sources: DS, SL

knotted, get: a kiss off remark to an individual or a group, usually intended in bantering good humor. The work "knotted" is usually applied to a person with problems or suffering from a hangup.
Sources: SL, DS

Knotty Ash: district in Liverpool often alluded to get a humorous response. The comedian Ken Dodd is often called the "Squire of Knotty Ash."
Sources:  GS, Moloney

knuckle buttie: a punch in the face
Source: Y

knucks: a brass knuckleduster or anything used in lieu, such as a piece of chain wrapped around the fist.
Source: LS2

Kocker it off, to: to get along
Source:  ST

kokum: seasoning, experience
Source: SI

Kop. De Kop: A favorite point of vantage at Liverpool Football Ground. Spion Kop is Afrikaans for a steep sided hill with trees and exposed rocks on top. In Afrikaans, Spion Kop meant "vantage point hill."  It was the site of either a bloody defeat or a Phyrric victory for the British (including a Liverpool regiment) in the Boer War, depending on which commentator you read.
Sources: LS1, SL, OED

Kosher Nostra, the : whimsical notion about an Israeli Mafia. Cf. the equally whimsical Welsh equivalent, The Taffia, more recently refined to the "Viet Taff.".
Source: LS4

Kru(or Kroo): now an obsolete term, it referred to early non-European settlers in Liverpool who came from the Liberian coast It came to mean any black African seaman.
Source: LCS