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

Though there are many ways to rig them, wacky style is the most common — and arguably the deadliest. — Joe Cermele, Outdoor Life, 15 Oct. 2026

The overall visual effect is like a cosmic variant of the wacky inflatable tube people outside used car dealerships. — Damien Pine, Scientific American, 14 Oct. 2026

The conveyor belts are just the latest stop in a fairly wacky progression. — New Atlas, 11 Oct. 2026

After 32 years, 99 shows, countless balloons and more wacky themes than anyone can remember, that magic is about to hit triple digits. — Spin Staff, SPIN, 7 Oct. 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