beat up on
To hit someone or be very mean and unfair to them, especially if they can't fight back.
Meanings
To physically assault someone, especially someone seen as a weaker target.
"Two older students were caught beating up on a first-year student."
To criticize or attack someone verbally in an unfair or excessive manner.
"The opposition kept beating up on the senator over his voting record."
To blame or criticize oneself excessively (reflexive: 'beat up on yourself').
"There's no point beating up on yourself — everyone makes mistakes."
More common in American English than British. The figurative sense (to unfairly criticize) is very frequently used in political and media contexts. Often implies an unfair power imbalance.
Commonly used with
Forms
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