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wacko Syllabification: wack·o
Pronunciation: /ˈwakō/
(also whacko) informal , chiefly North American

Definition of wacko in English:


Mad; insane: his willingness to pursue every wacko idea that enters his mind
More example sentences
  • Equally disturbing is what sort of messed up wacko ideas are floating around their heads regarding what is going on in the real world.
  • One of the perks of Adrants is that it spots new, whacko trends in the advertising world just about sooner than anyone.
  • I'd already done the book on Cobain's murder and I didn't want to get typecast in the book world as this wacko conspiracy nut.

noun (plural wackos)

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A crazy person.
Example sentences
  • In any case, I do think that trying to characterize the anti-war movement by the wackos is just what I said: a misrepresentation of the political opposition.
  • This is not to say we didn't get our share of itinerant whackos.
  • It appears to me to be one whacko testifying against another.


1970s: from wacky + -o.

Words that rhyme with wacko

tacho, taco, tobacco

Definition of wacko in:

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Word of the day haughty
Pronunciation: ˈhɔːti
arrogantly superior and disdainful