Beating a dead horse

[Jessica]

It doesnt matter how much you want to continue riding beating a dead horse is not going to get you anywhere.

If something is already done and over with there is no point in still talking about it.

If something is already broken there is no point in trying to use it.

[Tanya Shivari]

When something is already dead, and you keep bring it up over and over again

[Justin Bieber]

to continue to persue a situation that nothing is happening in.

taken from the act of whipping a horse to get it to move, even though it is dead, and aint going anywhere.

[Britney]

an act of sexual perversion combining [bestiality], [necrophilia] and [sado-mashocism].