do the dirty on sb Meaning in the Cambridge English Dictionary Cambridge dictionaries logo
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Meaning of “do the dirty on sb” in the English Dictionary

"do the dirty on sb" in British English

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do the dirty on sb

UK informal
to behave unfairly towards someone, usually without their knowledge: He can't forgive her for doing the dirty on him and having an affair with his best friend.
(Definition of do the dirty on sb from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)
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