beat a dead horse

To keep talking about or trying to fix something that can't be changed.

"We've already made the decision — there's no point beating a dead horse."

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Actually the Craziest Movie Ever Made

Kurtis Conner · 35:41

Beat a dead horse if you have to.

10 English Idioms with Meanings You CAN’T Guess

Adam’s English Lessons · engVid · 4:17

For example, when you say: "beat a dead horse", you

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