wacky

1 of 2

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

wackiness

2 of 2

noun

wack·​i·​ness -kēnə̇s 

-kin-

plural -es

: the quality or state of being wacky

Synonyms of wacky

Adjective

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

Examples of wacky in a Sentence

Adjective

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

the wacky world of his imagination

Recent Examples on the Web

Adjective

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

So where does this rank among the wackiest havoc ever wreaked by domes on innocent baseballs? — Jayson Stark, New York Times, 4 Oct. 2026

In 1943, the British intelligence service, MI6, came up with a wacky strategy to trick Adolf Hitler into thinking the Allies planned to invade Greece and Sardinia (not true) instead of Sicily (true), which Nazi Germany was heavily defending. — Chris Jones, Chicago Tribune, 1 Oct. 2026

Imagine this and other VenHub spots (two more in LA and two in Las Vegas) as a particularly wacky vending machine scaled up to the size of a van. — Rob Pegoraro, PC Magazine, 26 Sep. 2026

Word History

Etymology

Adjective

perhaps from English dialect whacky fool

First Known Use

Adjective

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