Meaning of “flog a dead horse” in the English Dictionary


"flog a dead horse" in English

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flog a dead horse

UK informal US informal beat a dead horse

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.

(Definition of “flog a dead horse” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)