adj · name · noun · 5 senses · updated from the 2026-07-25 local source snapshot
Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.
Sound
Pronunciation
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/ˈwæk/
Australia:Recorded audio is listed in the source snapshot.
rhymes with -æk
homophone: whack (wine–whine merger)
CMU ARPABET:W AE1 K
Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.
1
adj
Meaning 1
Annoyingly or disappointingly bad, in various senses; lousy, corny, cringy, uncool, messed up.
Definition source: English Wiktionary via Wiktextract
Usage: slang
Examples
Every record they ever made was straight-up wack.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
2
name
Meaning 2
A surname.
Definition source: English Wiktionary via Wiktextract
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
3
noun
Meaning 3
An eccentric; an oddball; a weirdo.
Definition source: English Wiktionary via Wiktextract
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
4
noun
Meaning 4
PCP, phencyclidine (as also whack).
Definition source: English Wiktionary via Wiktextract
Usage: dated
Qualifier: 70s drug slang
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
5
noun
Meaning 5
A friendly term of address.
Definition source: English Wiktionary via Wiktextract
Usage: UK
Qualifier: Liverpool
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: pal, mate
Antonyms: none provided
History
Etymology
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.
Clipping of wacker (“a Liverpudlian; a resident of Liverpool, England”).
Across languages
Translations
9 source translations are retained for this English entry.
Spanish:
pésimo
— annoyingly or disappointingly bad, in various senses
Spanish:
barbaridad
— annoyingly or disappointingly bad, in various senses
Spanish:
bestia
— annoyingly or disappointingly bad, in various senses