Definition of cut up phrasal verb from the Oxford Advanced American Dictionary

 

cut up

 phrasal verb
phrasal verb
 
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Phrasal Verbs

cut up

(informal)
 
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to behave in a noisy and silly way

    cut somebodyup

    (informal)
     
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  1. 1to injure someone badly by cutting or hitting them He was very badly cut up in the fight.
  2. 2[usually passive] to upset someone emotionally She was pretty cut up about them leaving.

cut somethingup

 
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to divide something into small pieces with a knife, etc. He cut up the meat on his plate.
See the Oxford Advanced Learner's Dictionary entry: cut up