whack - definition and synonyms

noun [countable] informal 

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/wæk/
singularwhack
pluralwhacks
  1. 1
    the act of hitting someone or something with a lot of force, or the sound that it makes

    Give the ball a good whack.

    Whack! A branch hit me in the face.

  2. 2
    British very informal a share of something, especially work

    You haven’t done your whack!

    1. a.
      very informal an amount of something, usually money

      The agent takes a 15% whack.

      the full whack:

      Even members of his family have to pay the full whack.

      top whack (=a lot of money):

      The case runs for several weeks with every lawyer on top whack.

  3. 3
    American an act of publicly criticizing someone