Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • adj. Slang Eccentric or irrational: a wacky person.
  • adj. Slang Crazy; silly: a wacky outfit.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Of a person or their behaviour, zany.
  • n. Alternative form of wacke.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • adj. informal or slang terms for mentally irregular
  • adj. ludicrous, foolish

Etymologies

from The American Heritage® Dictionary of the English Language, 4th Edition

Variant of whacky, probably from the phrase out of whack; see whack.

Examples

Comments

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  • This word has come to connote self-conscious, court-jester-style buffoonery, embarrassing to all concerned.

    A good example of the older, more straightforward sense of 'weird', 'absurd' or 'unusual' is the 1974 Dr Seuss book "Wacky Wednesday".

    November 17, 2007