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

• bizarre
• bizarro
• cranky
• crazy
• curious
• eccentric
• erratic
• far-out
• funky
• funny
• kinky
• kooky
• kookie
• odd
• off-kilter
• off-the-wall
• offbeat
• out-of-the-way
• outlandish
• outré
• peculiar
• quaint
• queer
• queerish
• quirky
• remarkable
• rum [chiefly British]
• screwy
• spaced-out
• strange
• way-out
• weird
• weirdo
• wild

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

Blanco, on the other hand, favors off-beat denim, pastel linen shirts over tank tops, and wacky prints—with a serious collection of cowboy boots. —Anna Cafolla, Vogue, 21 Mar. 2025

As with any popular gadget type, there's a whole ecosystem of niche, wacky, and comical add-ons available for drones. —Lily Hay Newman, WIRED, 20 Mar. 2025

Tammie Brown Making sense of drag queen Tammie Brown's wacky mind is a fool's errand — and yet, RuPaul casting her to help launch the inaugural season of Drag Race seems an obvious choice, in hindsight, within the Drag Race fantasy. —Ew Staff, EW.com, 20 Mar. 2025

The novella draws inspiration from all-time classic Bringing Up Baby, which puts paleontologist David Huxley (Cary Grant) in the path of wacky heiress Susan Vance (Katharine Hepburn) and her pet leopard, Baby. —Maureen Lee Lenker, People.com, 19 Mar. 2025

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