The Feeling One gets after taking a dump and then doing physical activity resulting in sweating, Swamp Ass is the feeling that you didnt wipe well enough.

Swamp ass can occur during periods of intense physical activity. It is a condition where your ass becomes sweaty giving you the feeling that your ass is actually in a swamp. If not treated swamp ass can lead to a more serious condition called duck butter.

"Donkey" from Shrek.

When your ass is sweating to the degree it feels like your sitting in a swamp. Usually the inside of your butt cheeks are wet and or slimy

1. The warm, moist feeling of one's ass from sitting for an extended period of time.

Swamp ass, in association with lengthy road trips, is usually accompanied by the smell of stale french fries that fell into your crotch that you failed to notice.

The build up of sweat around tha ass and ball region. Usually the first place you begin to sweat.

A condition of severely sweaty butt cheeks or crotch, where the sweat and any un-wiped or leaked fluids or poo from bad hygiene combines to make a disgusting stain that not only stinks up a 10 Ft radius in a crowd but attracts a horde of flies, hundreds of which collect on the stain and feed from it. overly tight nylon pants on a big female booty exacerbate the problem by intruding into the butt crack and wicking the fetid smear to the surface. The sufferer is sometimes unaware of this and does not correct it, leading to randomly taken pictures of their fly-infested ass appearing on the internet at their expense.