"To kick a dead horse" is an idiom. "Flog" may be a regional variant. I'm sure I've heard it.
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.
Avangi(I don't believe I've ever heard "to kick the dead horse.")"There's no use [in] kicking a dead horse" is common."It's no use to kick a dead horse" is common, as you say.Thanks for pointing out my mistake (I was erroneously looking for "kick THE..." in COCA,....sorry!)
fivejedjonI, a speaker of BrE, have used and heard only 'flog' in my 60+ years on the planet.The British National Corpus has five citations for flog (-s/-ging/-ged) a dead horse; It has none for beat or kick.Thank you, fivejedjon!
MUSCOVITE(1) Is it true that a large enough proportion of BrEng speakers say "I live ON ABC street" nowadays?What's large enough?