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

The Midnight Show’s original cast breakout star Lillian Martin, whose career was cut tragically short in her mid-twenties, was the queen of the wacky and weird. —Lee Kelly, PEOPLE, 12 Apr. 2026

With that in mind, here’s what Paul Sullivan knows about the wacky week in sports news. —Chicago Tribune, 9 Apr. 2026

Muniz is back as the titular Malcolm, the only sane voice in a particularly wacky family led by Kaczmarek (Lois) and Cranston (Hal). —Mekishana Pierre, Entertainment Weekly, 7 Apr. 2026

From the wacky to the sublime, this list shows the wide range of architectural experimentation and aesthetics in the Golden State. —Encyclopedia Britannica, 2 Apr. 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