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Tweet adj. wack·i·er, wack·i·est also whack·i·er or whack·i·est Slang 1. Eccentric or irrational: a wacky person. 2. Crazy; silly: a wacky outfit. [Variant of whacky, probably from the phrase out of whack; see WHACK.] wacki·ly adv. wacki·ness n. |
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