Flog a dead horse
Meaning
To waste effort on a lost cause or a matter that has already been decided and cannot be revived.
Origin
The phrase gained prominence in 19th-century Britain, often linked to the political arena. A popular anecdote attributes its rise to a debate in the House of Commons in 1872 concerning the dire state of the British Navy. Notoriously lacklustre during discussions of naval estimates, the members were chided by a frustrated MP, often cited as John Bright, who declared that "it was an attempt to flog a dead horse to get up any enthusiasm" for the topic. This vivid image of futile effort, trying to extract more work from a deceased animal, perfectly captured the futility of their ongoing discussion, solidifying the phrase's place in the English lexicon.
Examples
- Trying to convince management to reconsider the budget cuts now is just flogging a dead horse; the decision has already been made.
- We've discussed this issue for hours, and it's clear we won't agree, so let's stop flogging a dead horse and move on to something productive.