Meaning of “do a number on sb” in the English Dictionary

british dictionary

"do a number on sb" in British English

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do a number on sb

US slang

to injure someone or something, or to hurt or embarrass someone:

I really did a number on my ankle when I fell.
She really did a number on her old boyfriend, making him beg her to come back and then turning him down.

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