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English definition of “flog a dead horse”

flog a dead horse

UK informal
to waste effort on something when there is no chance of succeeding: He keeps trying to get it published but I think he's flogging a dead horse.Failing and doing badly
(Definition of flog a dead horse from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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Translations of “flog a dead horse”

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