wacko

1 of 2

adjective

variants or less commonly whacko
: 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
There’s still good investments, but not wacko. Time, 13 Nov. 2022 Sure, there are wackos who campaign against GMOs, but not all GMO critique is wacko. Keith Kloor, Discover Magazine, 19 Oct. 2012
Noun
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 You could also get lost attempting to read the splintered English and Hebrew letters running atop a stage festooned with wacko props and occult imagery. Andrew Lampert, Artforum, 1 May 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

Browse Nearby Words

Cite this Entry

“Wacko.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/wacko. Accessed 16 Jul. 2025.

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