wacko

W4A1C3K5O1
UK/ˈwæ.kəʊ/US/ˈwæ.koʊ/

adjective

Amusingly eccentric or irrational.

Less commonScrabble 14

Meanings

adjectivewacko (comparative more wacko, superlative most wacko)

comparative more wacko · superlative most wacko · alternative whacko

nounwacko (plural wackos or wackoes)

plural wackos · plural wackoes · alternative whacko

  1. derogatoryslangAn amusingly eccentric or irrational person.

    “Environmentalist wackos” — Mr. Limbaugh’s phrase — “want man to be responsible for it because they want to control your behavior,” the conservative host said on the show.

    2020 September 15, Michael M. Grynbaum, Tiffany Hsu, quoting Rush Limbaugh, “‘Nothing to Do With Climate Change’: Conservative Media and Trump Align on Fires”, in The New York Times, →ISSN

    Synonyms: kook, odd duck, weirdo, bizarro, coot, crackpot, crank, eccentric

interjection

alternative whacko

  1. UKdatedHurrah!

    "Wacko! There's a whole pile of letters for me," Jennings cried excitedly, hopping from one foot to the other.

    1952, Anthony Buckeridge, Jennings and Darbishire

    Synonyms: get in, huzzah, woo hoo, aah, alright, 'ave it, ay, ayy

Synonyms & antonyms

More synonyms by meaning

nouna person who is regarded as eccentric or mad

Broader
eccentriceccentric personflake

Synonym sets from Open English WordNet, CC BY 4.0.

Origin

  1. Englishwhack
  2. Englishwack(y)
  3. Latinō
  4. Old Frenchoh
  5. Middle Englisho
  6. EnglishO
  7. Middle Englisho
  8. Englishoh
  9. Englishwacko

From wack(y) + -o.

Full word history & related roots →

Translations

German durchgeknallt, spinnert
  • durchgeknalltamusingly eccentric or irrational
  • spinnertamusingly eccentric or irrational
  • schrillamusingly eccentric or irrational
Russian чудной
  • чудной (čudnoj)amusingly eccentric or irrational
Swedish knäppgök
  • knäppgökamusingly eccentric or irrational

Rhymes & wordplay

Rhymes with wacko

All rhymes →
Cite this entry
APA

wacko. (n.d.). In WatkinsX Dictionary. Retrieved November 2, 2026, from https://dictionary.watkinsx.com/word/wacko

MLA

“wacko.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/wacko. Accessed November 2, 2026.

Chicago

WatkinsX Dictionary, s.v. “wacko,” accessed November 2, 2026, https://dictionary.watkinsx.com/word/wacko.

Source: wacko on Wiktionary, CC BY-SA 4.0.