dead-horse

dead horse

noun
1.
something that has ceased to be useful or relevant.
Idioms
2.
beat/flog a dead horse, to persist in pursuing or trying to revive interest in a project or subject that has lost its usefulness or relevance.

Origin:
1820–30, Americanism

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Slang Dictionary

dead horse definition


  1. n.
    a dead issue, especially one that is referred to continually. (Often with beat, whip.) : Forget it! Don't waste time whipping a dead horse.
Dictionary of American Slang and Colloquial Expressions by Richard A. Spears.Fourth Edition.
Copyright 2007. Published by McGraw-Hill Education.
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