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English definition of “sell sb down the river”

sell sb down the river

informal
to put someone in a difficult or dangerous situation by not acting as you had promised to act , usually in order to win an advantage for yourselfDisloyalty, betrayal and treason
(Definition of sell sb down the river from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

Translations of “sell sb down the river”

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