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beat up

 
See:
beat
part of speech: phrase
definition 1: to hit or kick (someone) until seriously injured.
The gangsters beat up the shop owner and left him on the floor.He said if I don't give him the money, he'll beat me up.
definition 2: to feel guilty or criticize (oneself) excessively, or to blame or criticize (another) severely.
You shouldn't beat yourself up about it; it really wasn't your fault.I know I shouldn't have done that, but you don't have to beat me up!