Definition of


  1. (noun, event) the sound made by a sharp swift blow
  2. (noun, act) the act of hitting vigorously
  3. (verb, contact) hit hard

via WordNet, Princeton University

Synonyms of Whack

belt, knock, rap, wallop, wham, whang, whop

Alternate forms of Whack

Derivations: whack, whacking

Hypernyms: blow, hit, sound

Origin of the word Whack

  1. "to strike sharply," 1719, probably of imitative origin. The noun is from 1737. The word in out of whack (1885) is perhaps the slang meaning "share, just portion" (1785), which may be from the notion of the blow that divides, or the rap of the auctioneer's hammer. more

via Online Etymology Dictionary, ©2001 Douglas Harper

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