beat a dead horse

== English == === Alternative forms === flog a dead horse === Pronunciation === === Verb === beat a dead horse (third-person singular simple present beats a dead horse, present participle beating a dead horse, simple past beat a dead horse, past participle beaten a dead horse or (colloquial) beat a dead horse) (idiomatic) To persist or continue far beyond any purpose, interest or reason. ==== Translations ==== === See also === necrohippoflagellation necrohipposadism kick someone when they are down preach to the choir