Meaning of “do sb in” in the English Dictionary

"do sb in" in British English

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do sb in

phrasal verb with do uk // /du/ /duː/ us // /du/ /duː/ verb did, done


slang to kill someone:

They threatened to do me in if I didn't pay up by Friday.


informal to make someone extremely tired:

Playing basketball all day really did me in.

(Definition of “do sb in” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)