Nearby words

  1. wh-,
  2. wh-question,
  3. wh-word,
  4. wha,
  5. whachamacallit,
  6. whack off,
  7. whacked,
  8. whacked out,
  9. whacked-out,
  10. whacking


    out of whack, Informal. out of order or alignment; not in proper condition.

Origin of whack

1710–20; orig. dial., Scots form of thwack; cf. whang2, whittle

Related formswhack·er, noun Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for whack

British Dictionary definitions for whack


verb (tr)

to strike with a sharp resounding blow
(usually passive) British informal to exhaust completely
(tr; usu foll by in or on) informal to put something on to or into something else with force or abandonwhack on some sunscreen


(tr) US slang to murderif you were out of line you got whacked
a sharp resounding blow or the noise made by such a blow
informal a share or portion
informal a try or attempt (esp in the phrase have a whack at)
out of whack informal out of order; unbalancedthe whole system is out of whack


an exclamation imitating the noise of a sharp resounding blow
Derived Formswhacker, noun

Word Origin for whack

C18: perhaps a variant of thwack, ultimately of imitative origin

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

Word Origin and History for whack



"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.

Online Etymology Dictionary, © 2010 Douglas Harper

Idioms and Phrases with whack


In addition to the idioms beginning with whack

  • whacked out
  • whack off

also see:

  • have a crack (whack) at
  • out of kilter (whack)
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.