It doesn't 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.
Someone breaks up with there girl/boyfriend and continues to bitch about them to there friends weeks later. That person is beating a dead horse, the relationship is over there is no point in thinking about it since the matter is already resolved with you having broken up.
Relationship = dead horse
Bitching about it = beating it
Trying over and over to start your car after you've been in an accident where it is clear that the car is not going to work.
Broken Car = dead horse
Trying to start it = beating it
When something is already dead, and you keep bring it up over and over again
counter strike is a dead horse that everybody should stop beating
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.
"sometimes I feel like I'm beating a dead horse"
"It's going nowhere, stop beating the dead horse"
A government study was funded to study various sexual perversions: sado-masochism, necrophilia and bestiality. The study was soon halted however ... the researchers decided they were just beating a dead horse.