The origin of this problem is the ass crack. Once sweaty it begins to get itchy, like you did not wipe well enough. After it gets unbearable you begin to scratch like crazy, and shortly thereafter your whole ass feels like one big cactus has spanked you for hours.
John and Bryan were walking home at a fast pace; Due to the intense friction, John's ass crack began to sweat and itch. Result, Swamp ass.
by Bryan & John May 30, 2006
"Swamp ass" is the putrid stench eminating from the human groin. It is caused by sweat and/or not wiping the ass sufficiently.
by Da Nastee One May 11, 2004
An oily, wet, sometimes lumpy secretion which becomes plastered,...no..pasted, between the cheeks of your ass, and in the worst cases, oozes out of the crack near the satchel and skid marks your underwear, and if your wearing slacks, them too. Condition can bring on an uncomfortable rash, butt cheek pimples, and the dreaded festering lump around your underwear leg band.
by Pierce-a-cola February 5, 2008
The slight or severe inflamation of the inner ass cheeks due to excessive walking or running after taking a deuce. Usually a slight refuge of junk surrounds and agitates the exit region.
by Cambo El Nino November 9, 2006
by Loser123 December 16, 2018
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.
Nigel: Oh man- look at that nasty whore with the big booty and red pants! Is that a brown stain in the crack of her ass or a horde of flies on a brown stain?
William: Shit man, she's got the Swamp Ass!
William: Shit man, she's got the Swamp Ass!
by abjectus May 8, 2012
by Supparad70 November 25, 2015