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English definition of “do the dirty on sb”

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.Disloyalty, betrayal and treasonCheating and trickingPlotting and trapping
(Definition of do the dirty on sb from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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Translations of “do the dirty on sb”

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