Definition of knock around phrasal verb from the Oxford Advanced Learner's Dictionary

 

knock around

 phrasal verb
phrasal verb
 
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Phrasal Verbs

    knock around…

    (British English also knock about…)(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 around

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knock something around

(British English also knock somebody/something about)
 
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(informal) to hit somebody/something repeatedly; to treat somebody/something roughly
See the Oxford Advanced American Dictionary entry: knock around