Definition of
Whacky
- (adj, all) informal or slang terms for mentally irregular
- (adj, all) ludicrous, foolish
wore a goofy hat
a silly idea
some wacky plan for selling more books
via WordNet, Princeton University
Synonyms of Whacky
around the bend, balmy, barmy, bats, batty, bonkers, buggy, cockamamie, cockamamy, cracked, crackers, daft, dotty, fruity, goofy, haywire, kookie, kooky, loco, loony, loopy, nuts, nutty, round the bend, sappy, silly, wacky, zany