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poison sb's mind

disapproving

Definition

to make someone believe unpleasant things about another person that are not true: Don't listen to her lies - she's just trying to poison your mind against me.Cheating and trickingPlotting and trappingDamaging reputationDisapproving and criticizing
(Definition of poison sb's mind from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

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