Meaning of “get away with sth” - Learner’s Dictionary

get away with sth

phrasal verb with get us uk /ɡet/ verb present participle getting, past tense got, past participle got, US gotten

B2 to succeed in doing something bad or wrong without being punished or criticized:

He shouldn't treat you like that. Don't let him get away with it.

(Definition of “get away with sth” from the Cambridge Learner’s Dictionary © Cambridge University Press)