[ wak-ee ]
See synonyms for: wackywackiness on Thesaurus.com

adjective,wack·i·er, wack·i·est.Slang.
  1. odd or irrational; crazy: They had some wacky plan for selling more books.

Origin of wacky

First recorded in 1935–40; apparently whack (noun, as in out of whack) + -y1
  • Also whack·y [hwak-ee, wak-ee] /ˈʰwæk i, ˈwæk i/ .

Other words from wacky

  • wack·i·ly, adverb
  • wack·i·ness, noun

Words Nearby wacky

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How to use wacky in a sentence

British Dictionary definitions for wacky


/ (ˈwækɪ) /

adjectivewackier or wackiest
  1. slang eccentric, erratic, or unpredictable

Origin of wacky

C19 (in dialect sense: a fool, an eccentric): from whack (hence, a whacky, a person who behaves as if he had been whacked on the head)

Derived forms of wacky

  • wackily, adverb
  • wackiness, noun

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012