wacky

adjective

ˈwa-kē 

variants or less commonly whacky

wackier also whackier; wackiest also whackiest

: absurdly or amusingly eccentric or irrational

wacky ideas

a wacky comedian

wackily

ˈwa-kə-lē 

adverb

wackiness

ˈwa-kē-nəs 

noun

Synonyms of wacky

• bizarre
• funny
• strange
• weird
• odd
• peculiar
• curious
• erratic
• eccentric
• crazy
• remarkable

Examples of wacky in a Sentence

My wacky aunt takes a swim before the lake freezes every winter.

the wacky world of his imagination

Recent Examples on the Web

Nina Shipman, who came from a prominent show business family to star alongside Fred MacMurray in The Oregon Trail and step in for Grandpa in a ploy to make Lily jealous on one of the wackiest episodes of The Munsters, has died. — Mike Barnes, HollywoodReporter, 9 Sep. 2026

Cowboys at Giants Time to get wacky with the rest of the picks. — The Athletic Staff, New York Times, 9 Sep. 2026

Beer brands brewing wacky prizes and products Samuel Adams' Front Yard Beer Hall is isn't the first beer shed unveiled this summer. — Mike Snider, USA Today, 1 Sep. 2026

The actual titular story of this premiere is more of a wacky subplot. — Ben Rosenstock, Vulture, 28 Aug. 2026

Word History

Etymology

perhaps from English dialect whacky fool

First Known Use

1930, in the meaning defined above

Rhymes for wacky

• bacchae
• jacky
• lackey
• tacky

Kids Definition

wacky

adjective

ˈwak-ē 

wackier; wackiest

: amusing and very strange

wackily

ˈwak-ə-lē

adverb

wackiness

ˈwak-ē-nəs

noun