dead horse(redirected from dead horse, a)
1. An issue or topic that is no longer of any importance or relevance (as used in the phrase "beat/flog a dead horse"). The President's pledge to overhaul the education system became something of a dead horse after the economy crashed. We've all moved on from that problem, so there's no use beating a dead horse.
2. dated A seaman who incurs debt for wages paid in advance. Countless men became dead horses on their ships, trapped paying off debts that were in themselves incurred to pay off other debts, in an endless cycle.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
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.
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.