Wack

//wæk// adj, name, noun, slang

adj, name, noun, slang ·Moderate ·High school level

Definitions

Noun
  1. 1
    An eccentric; an oddball; a weirdo.
  2. 2
    A friendly term of address. UK

    "A few well chosen words such as "Let's be having you wack!", works wonders. The dockers know that they've got a Scouse to deal with. I'm not saying that a Southerner couldn't handle the situation, but the job might well take longer."

  3. 3
    PCP, phencyclidine (as also whack). dated
Adjective
  1. 1
    Annoyingly or disappointingly bad, in various senses; lousy, corny, cringy, uncool, messed up. slang

    "Every record they ever made was straight-up wack."

Proper Noun
  1. 1
    A surname.

Synonyms

All synonyms
bizarrocrackpotcrankfreakkjkook

Antonyms

All antonyms
ill

Example

More examples

"You'll find that the voting patterns are completely out of wack with the constituents."

Etymology

Etymology 1

Back-formation from wacky. Alternatively, possibly a blend of white + black, in the sense that it may appear black on the outside, but it's really white on the inside. Compare oreo.

Etymology 2

Clipping of wacker (“a Liverpudlian; a resident of Liverpool, England”).

Related phrases

wack outwack shackwicky-wack

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.