Coming from many game forum boards, beating the Dead horse is a term used to describe a topic that has been debated/discussed to death.
FFXIGamer1: WHICH JOB IS BEtTER, pld or nINja??!?

FFXIGamer2: Stop beating the f*cking dead horse....
by Rellinger April 7, 2005
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The only thing to do with a horse after you have beaten it.
Okay. We get it. Michael Vick is playing football again. Quit fucking a dead horse.
by JamesBeam November 16, 2010
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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
by Kyle Biddle August 3, 2004
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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"
by ChipmunkOnKetamine November 8, 2009
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An instance in which the "beater" of the horse will continue to try and make amusing comments until either
A.) Somebody makes a "pity laugh" (this is usually the person who originally told the joke) or:
B.) Everyone leaves.

This is a common occurrence when a moderately funny person loses their game, and is convinced that they are not off of their game.
The perfect example of beat the dead horse.

MD: "Yo wassup homeslice! I was just chillin like a felon up in hurr."
OM: "Oh, awesome."
MD: "Word it was so tite and of the hizzle son! Shit!"
AS: "umm cool"
MD: "Damn staraight Gangsta. I'z with all ma peeps."
JK: "thats great..."
MD: "You know what else is great? My dick!" (MD laughs at his own joke, hoping others will too.)
WH: "shut the hell up mark youre not funny"
JB: "Whack! Whack! Whack! Neeeiiigh!!"
MD: "Peace out haters"
by Will Hinshaw, Joe Kovach March 22, 2008
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UK usage

1) To try to carry on when there really is no hope of continuation. To not know when to give up.

2) A unique sexual practise that combines Necrophillia, beastiality and sadomasacism into one fun activity.
Leeds struggled to avoid relegation but they were flogging a dead horse.
by black flag June 7, 2004
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The act of pushing onward when a decision has already been made and will not change.
Tod: I think we should eat tacos every night.
Tim: I think you should shut up because tacos every night is the worst idea ever.
Tod: Tacos. Every. Night.
Sam: Dude, no.

Tod: WE NEED TO EAT TACOS EVERY FRIGGIN' NIGHT, MAN!
Tim: *sigh*
Sam: Way to beat a dead horse...
by Noodle8 October 29, 2011
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