Definition of whack verb from the Oxford Advanced American Dictionary

     

    whack

     verb
    verb
    NAmE//wæk//
     
    Verb Forms present simple I / you / we / they whack
     
    he / she / it whacks
     
    past simple whacked
     
    -ing form whacking
     
     
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  1. 1whack somebody/something (informal) to hit someone or something very hard She whacked him with her handbag. James whacked the ball over the net.
  2. 2 whack somebody (slang) to murder someone
See the Oxford Advanced Learner's Dictionary entry: whack