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

Director David Wain, who co-wrote the comedy with Marino, his longtime creative partner and college buddy from NYU, praises his pal’s wacky comedic skills. — Eric Andersson, PEOPLE, 15 July 2026

The players alternate in describing crude, scribbly MS Paint-style images of wacky things like two nuclear mushroom clouds French-kissing. — Tasha Robinson, Vulture, 14 July 2026

The show sees Neal and McLaughlin face off in challenges and games (sometimes with a celebrity guest), test out wacky products, and occasionally do surprising taste tests. — Alex Weprin, HollywoodReporter, 14 July 2026

And, as Meehan notes, Angela was more than just a wacky personality. — Dalton Ross, Entertainment Weekly, 13 July 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