variants
or less commonly Synonyms of wacko
: wacky
variants
or less commonly
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Definition of wacko (Entry 2 of 2)
: a person who is wacky
also
: psycho entry 1
Synonyms
Adjective
- balmy
- barmy [chiefly British]
- bats
- batty
- bedlam
- bonkers
- brainsick
- bughouse [slang]
- certifiable
- crackbrained
- cracked
- crackers
- crackpot
- cranky [dialect]
- crazed
- crazy
- cuckoo
- daffy
- daft
- demented
- deranged
- fruity [slang]
- gaga
- haywire
- insane
- kooky
- kookie
- loco [slang]
- loony
- looney
- loony tunes
- looney tunes
- lunatic
- mad
- maniacal
- maniac
- mental
- meshuga
- meshugge
- meshugah
- meshuggah
- moonstruck
- non compos mentis
- nuts
- nutty
- psycho
- psychotic
- scatty [chiefly British]
- screwy
- unbalanced
- unhinged
- unsound
- wacky
- whacky
- wud [chiefly Scottish]
Noun
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
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
Sun Sentinel Editorial Board, Sun Sentinel, 3 Apr. 2024
Out of nowhere, there’s a wacko outdoor puppet theater production by a troupe that operates like a New Age cult.
—Charles McNulty, Los Angeles Times, 25 June 2024
See all Example Sentences for wacko 
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Opinions expressed in the examples do not represent those of Merriam-Webster or its editors.
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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
Now, watch: Trump will choose some wacko to be his vice presidential running mate, and all my plans will go up and smoke.
—Sun Sentinel Editorial Board, Sun Sentinel, 3 Apr. 2024
Out of nowhere, there’s a wacko outdoor puppet theater production by a troupe that operates like a New Age cult.
—Charles McNulty, Los Angeles Times, 25 June 2024
See all Example Sentences for wacko
Dictionary Entries Near wacko
Cite this Entry
“Wacko.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/wacko. Accessed 14 Jan. 2025.
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