Noun whack has 2 senses
  1. whack - the sound made by a sharp swift blow
    --1 is a kind of
    sound
  2. knock, belt, rap, whack, whang - the act of hitting vigorously; "he gave the table a whack"
    --2 is a kind of blow
    Derived form: verb whack1
,Verb whack has 1 sense
  1. whack, wham, whop, wallop - hit hard; "The teacher whacked the boy"
    --1 is one way to hit
    Derived forms: noun whack2, noun whacking1
    Sample sentence:
    The fighter managed to whack his opponent
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