Here you’ll find 47 Slang words that start with K, organized from “k” to “kvetch”. Many entries show regional use and a mix of single-letter shorthand and longer borrowed terms.
Slang words that start with K are informal expressions, abbreviations, or borrowings used in casual speech. One notable example, “kvetch,” comes from Yiddish and is commonly used to mean “complain.”
Below you’ll find the table with Word, Meaning, Region, Register, Example, and Source.
Word: The slang term as used; you can scan here to find exact spelling, variants, and common forms.
Meaning: Clear short definition and sense of use so you quickly understand how people use the term.
Region: Indicate where the term is common so you know if it’s local, national, or international.
Register: Label the tone and level (informal, pejorative, playful) so you can judge appropriate usage.
Example: Brief sentence showing the term in context so you see natural use and choose correct phrasing.
Source: Note origin or a brief citation that indicates where the term appears and when, helping your further research.
Slang words that start with K
| Term | Meaning | Part_of_speech | Region & Register |
|---|---|---|---|
| k | okay; acknowledgement | interj | global; internet |
| kk | okay; acknowledged | interj | global; internet |
| kay | okay; casual assent | interj | US; informal |
| kiki | party or gossip session | noun | US; informal |
| kibosh | put an end to | noun | UK/US; informal |
| kibitz | offer unsolicited comment | verb | US; informal |
| kvetch | complain persistently | verb | US; informal |
| kvell | feel proud with delight | verb | US; affectionate |
| kief | cannabis resin; potency dust | noun | US; informal |
| kush | high-grade cannabis strain | noun | US; informal |
| krunk | energetic; hyped; party | adj/verb | US; youth |
| k-hole | ketamine-induced dissociation | noun | US; informal |
| kegger | party centered on a keg | noun | US; youth |
| kegstand | drinking stunt on a keg | noun | US; youth |
| keister | buttocks; storage area | noun | US; informal |
| kip | nap; cheap bed or lodging | noun/verb | UK; informal |
| knackered | very tired; exhausted | adj | UK; informal |
| knacker | to wear out; broken item | verb/noun | UK; informal |
| knickers | underwear (women’s) | noun | UK; informal |
| knob | idiot; penis (vulgar) | noun | UK; pejorative |
| knobhead | stupid or obnoxious person | noun | UK; pejorative |
| knock-off | counterfeit imitation | noun | global; informal |
| knockers | breasts (slang) | noun | US/UK; informal |
| knockback | rejection; refusal | noun | US/UK; informal |
| knock-up | impregnate; wake someone | verb/phrase | US/UK; informal |
| knock it off | stop that behavior | interj/phrase | global; informal |
| kickback | bribe; illicit payment; tip | noun | global; informal |
| kickass | very impressive; excellent | adj | US; informal |
| kiddo | affectionate form of “kid” | noun | US; affectionate |
| kidult | adult enjoying childlike hobbies | noun | US; informal |
| killer | extremely good or deadly | adj | US; informal |
| kill it | perform brilliantly | verb/phrase | US; informal |
| killjoy | spoilsport; party pooper | noun | global; informal |
| kisser | mouth; puckerer | noun | US; informal |
| kiss-ass | sycophant; bootlicker | noun | US; pejorative |
| ka-ching | sound of profit; money | interj | global; informal |
| kayfabe | wrestling staged reality | noun | US; informal |
| klutz | clumsy person | noun | US; informal |
| kludge | inelegant technical fix | noun | US; informal |
| kooky | eccentric; odd | adj | US; informal |
| kook | odd or extreme person | noun | US; informal |
| kudos | praise; acclaim | noun | global; informal |
| kak | shit; rubbish; bad | expletive | South Africa; informal |
| kike | offensive slur for Jewish people | noun | US; pejorative |
| kraut | derogatory term for Germans | noun | US; pejorative |
| kayo | knockout (boxing); to knock out | noun/verb | US; informal |
| kipple | meaningless clutter; junk | noun | US; informal |
Descriptions
k
Single-letter reply meaning “okay” in texts/chats; terse and sometimes brusque. Example: “k, see you.” (Texting corpora)
kk
Repeated-k variant of “k” used in chats/gaming as polite acknowledgement. Example: “kk, I’ll join.” (Gaming chats)
kay
Colloquial spelling of “okay” used in speech and messages. Example: “Kay, let’s go.” (Colloquial usage)
kiki
Lively social gathering or chat in queer culture; also a verb (“to kiki”). Example: “We had a kiki last night.” (Queer slang)
kibosh
To decisively stop something; common in idiom “put the kibosh on.” Example: “They put the kibosh on plans.” (OED; US usage)
kibitz
To chime in, often annoyingly, especially during games or conversations. Example: “Don’t kibitz the chess match.” (Yiddish loan)
kvetch
Yiddish-derived slang meaning to gripe or whine; common in everyday talk. Example: “Stop kvetching.” (US colloquial)
kvell
Yiddish-derived term meaning to beam with pride at someone else’s success. Example: “I’m kvelling over her.” (Affectionate use)
kief
Powdery trichomes collected from cannabis; added for extra potency. Example: “Top the bowl with kief.” (Cannabis community)
kush
Refers to potent indica strains and, by extension, high-quality weed. Example: “He smokes Kush.” (Cannabis culture)
krunk
Hip-hop slang meaning rowdy, pumped, or partying hard. Example: “The club got krunk.” (Hip‑hop slang)
k-hole
Slang for dissociative out-of-body state from ketamine use; drug-context caution. Example: “He fell into a K-hole.” (Drug forums)
kegger
College-style beer party with a keg; common US campus slang. Example: “We’re hosting a kegger.” (US college)
kegstand
Party stunt where someone is held upside-down drinking from a keg tap. Example: “He did a kegstand.” (College slang)
keister
Humorous slang for backside; also figuratively means a hidden place. Example: “He fell on his keister.” (US colloquial)
kip
British slang: to sleep/snooze or a shabby room. Example: “I’m going for a kip.” (UK usage)
knackered
Common British informal adjective meaning utterly exhausted. Example: “I’m knackered.” (UK corpora)
knacker
Verb: to exhaust or ruin; noun: an old, broken thing. Example: “That car’s knackered.” (UK colloquial)
knickers
British term for underpants; neutral informal register. Example: “Her knickers were bright.” (UK usage)
knob
Pejorative insult meaning jerk, or vulgar term for penis; use with caution. Example: “Don’t be a knob.” (UK slang)
knobhead
Stronger British insult derived from “knob”; common in informal abuse. Example: “He’s a knobhead.” (UK forums)
knock-off
Slang for fake-brand goods or cheap copies. Example: “That’s a knock-off bag.” (Consumer discourse)
knockers
Colloquial, mildly bawdy term for breasts; informal context. Example: “She has big knockers.” (Colloquial)
knockback
Used for social or commercial rejections (dates, proposals, offers). Example: “He got a knockback.” (Everyday speech)
knock-up
US: to impregnate; UK (dated): to wake someone. Regional senses differ—beware. Example: “She got knocked up.” (Colloquial)
knock it off
Direct informal command telling someone to stop. Example: “Knock it off!” (Everyday speech)
kickback
Illicit payment for favors; also casual meaning “a social get-together” in some US contexts. Example: “They paid kickbacks.” (Legal/crime contexts)
kickass
High-energy informal adjective meaning outstanding or formidable. Example: “That was a kickass set.” (Colloquial)
kiddo
Friendly or slightly patronizing address for someone younger or close. Example: “Alright, kiddo.” (Informal)
kidult
Blend of “kid” + “adult”: adults engaging in youth-oriented interests. Example: “He’s a proud kidult.” (Cultural writing)
killer
Colloquial adjective meaning excellent, intense, or deadly. Example: “That solo was killer.” (Informal)
kill it
Phrase meaning to succeed spectacularly in performance or task. Example: “She killed it tonight.” (Performance slang)
killjoy
Person who dampens others’ fun or enthusiasm. Example: “Don’t be a killjoy.” (Everyday)
kisser
Informal term for mouth or someone who kisses; can be jocular. Example: “Shut your kisser.” (Colloquial)
kiss-ass
Derogatory term for someone who flatters superiors for advantage. Example: “He’s a kiss-ass.” (Workplace slang)
ka-ching
Onomatopoeic exclamation indicating money made or profit. Example: “Sales up — ka-ching!” (Advertising/informal)
kayfabe
Wrestling jargon for maintaining the illusion that events are real; used metaphorically. Example: “Keep kayfabe.” (Wrestling community)
klutz
Yiddish-derived slang for a bungler or clumsy person. Example: “I’m such a klutz.” (US colloquial)
kludge
Tech/engineering slang for a makeshift, awkward solution that works. Example: “That’s a kludge.” (Tech jargon)
kooky
Playful term for eccentric or bizarre behavior; mild and often affectionate. Example: “She’s a bit kooky.” (Colloquial)
kook
Mildly derogatory term for someone considered eccentric or extreme. Example: “He’s a political kook.” (Informal)
kudos
Informal word expressing credit or praise for achievements. Example: “Kudos to the team.” (Common usage)
kak
Afrikaans-derived vulgar term meaning “shit” or “rubbish”, widely used in South African English. Example: “That’s kak news.” (ZA slang)
kike
Extremely offensive ethnic slur; included for completeness with stern caution—avoid use. (Historical; hate-speech)
kraut
Derogatory wartime slur for Germans; offensive and dated. Avoid use. (Historical usage)
kayo
Boxing slang for a knockout; also used figuratively (“kayoed”). Example: “He got the kayo.” (Sports reports)
kipple
Coined by Philip K. Dick to denote useless detritus; used metaphorically for consumer clutter. Example: “My desk is full of kipple.” (Sci‑fi literature)