The meaning of WACKY is absurdly or amusingly eccentric or irrational. How to use wacky in a sentence.

WACKY definition: 1. unusual in a pleasing and exciting or silly way: 2. unusual in a pleasing and exciting or silly…. Learn more.

Definition of wacky adjective in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

Eccentric or irrational: a wacky person. 2. Crazy; silly: a wacky outfit....

Feb 23, 2026 · Adjective wacky (comparative wackier, superlative wackiest) (slang, informal) Zany; eccentric. Synonyms: eccentric, whacky, whacko, zany

wack•y (wak′ ē), adj., wack•i•er, wack•i•est. [Slang.] Slang Terms odd or irrational; crazy: They had some wacky plan for selling more books. Also, whacky.

Wacky definition: Eccentric or irrational.

WACKY definition: odd or irrational; crazy. See examples of wacky used in a sentence.

If you describe something or someone as wacky, you mean that they are eccentric, unusual, and often funny.

wacky / ˈ wæki/ adjective wackier; wackiest Britannica Dictionary definition of WACKY [also more wacky; most wacky] informal : amusing and very strange