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1.
A chair or couch so big and fluffy that people feel compelled to bury entire populations of farts in it, on the premise that the farts will stay put if left undisturbed. This assumption is generally true until the farter gets up or until someone else sits down.
Dude #1, sitting down:

Oh! G-d! I'm trying to relax, but right now it smells like I'm giving a homeless guy a rim job!

Dude #2:

That's our couch, man. And don't move too fast getting up, it's a fart graveyard.
by MakeItStopItHurts August 30, 2010