Definition of knock around phrasal verb from the Oxford Advanced American Dictionary

 

knock around

 phrasal verb
phrasal verb
 
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Phrasal Verbs

    knock around…

    (informal)
     
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  1. 1to travel and live in various places He spent a few years knocking around Europe.
  2. 2used to say that something is in a place but you do not know exactly where It must be knocking around here somewhere.

knock somebody/something around

(informal)
 
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to hit someone or something repeatedly; to treat someone or something roughly
See the Oxford Advanced Learner's Dictionary entry: knock around