wacko

1 of 2

adjective

variants or less commonly whacko
Synonyms of wackonext
: wacky

wacko

2 of 2

noun

variants or less commonly whacko
: a person who is wacky

Examples of wacko in a Sentence

Adjective a completely wacko obsession with cleaning Noun She's nice but her sister's a real wacko. a completely wacko obsession with cleaning
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Adjective
Featuring four distinct stories (including Overlook hit MLM), this zany, bloody, wacko tale of inequality is sure to galvanize anyone who has ever felt lost in a sea of menial repetitious tasks. William Earl, Variety, 25 Mar. 2026 One Battle After Another is based very loosely on the basic outline, and some of the less-surreal elements, of Thomas Pynchon’s wacko novel Vineland. Jordan Hoffman, Entertainment Weekly, 11 Mar. 2026
Noun
This wacko crew was one of the greatest things in the history of television. Jordan Hoffman, EW.com, 14 Aug. 2025 His search takes him to a wacko cult in the desert run by a scamster, and that of course puts the sheriff in deadly danger. Sandra Dallas, Denver Post, 6 July 2025 See All Example Sentences for wacko

Word History

Etymology

Adjective

by alteration

First Known Use

Adjective

1965, in the meaning defined above

Noun

1936, in the meaning defined above

Time Traveler
The first known use of wacko was in 1936

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Cite this Entry

“Wacko.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/wacko. Accessed 31 Mar. 2026.

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