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
Charles McNulty, Los Angeles Times, 25 June 2024
This is a wacko package to be sure, and overlong at two-and-three-quarter hours, so mileage will vary even for devoted Lanthimos fans.
—David Rooney, The Hollywood Reporter, 17 May 2024
See all Example Sentences for wacko 
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
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
This is a wacko package to be sure, and overlong at two-and-three-quarter hours, so mileage will vary even for devoted Lanthimos fans.
—David Rooney, The Hollywood Reporter, 17 May 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 24 Nov. 2024.
Copy CitationLove words? Need even more definitions?
Merriam-Webster unabridged
Share