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!
by abjectus May 07, 2012
A common condition in which the ass crack and crotch becomes overly moist, sweaty, and stinky from one or all of the following:
- sweating on a hot day
- not bathing enough
- long day of work, sports, play
- incomplete wipe due to rush or laziness

The crack will often feel squishy, wet, unpleasant, and itchy. It is recommended to take a bath with soap to sanitize the condition.
Example:

After a long day of moving furniture. "I need to go home and take a shower before I get swamp ass."
by Ragdolly July 15, 2005
when you get hot and your ass sweats. it makes for a bad time
"awww man after sitting down for so long i got swamp ass"
by curioustrollpower June 06, 2004
An unfortunate condition in which the taint (the often hair-bespeckled, flrshy space between balls and ass) is wallowing in the depths of a vile, festering, putrid poo swamp. A generally uncomfortable, unwipable ass. The only cure is gold bond.
Jesus Christ, I hope Janice doesn't notice the permeating stench of my swamp ass while she's sucking on my balls!
by Larry Schonsleberry III December 08, 2003
Is the condition when you sweat a lot in the ass/ball region and it releases a terrible smell. Other factors that add to the condition is not wiping properly and not showering daily.
I was standing behind Jordan and he smelled bad I said wow you have some bad swampass.
by Trace S. January 22, 2007
the nasty feeling when your butt crack is sweaty, causing your underwear and pants to stick, or an occasional itching feeling. Ussually caused by elevated tempatures or humidity while working or excessive walking.
Ryan's been walking around in this heat all day and now he complains of haveing a bad case of swampass.
by KRaZY Kristen September 03, 2005
A build up of sweat and schmancter usually forming on the under carriage in the crease between the berry bag and the inner thigh. After aging, "swamp ass" can put out a distinct and distasteful odor. Swamp ass is caused by extended periods of physical activity. Obesity can contribute to the severity.
After several hours of worm wrestling and sword fighting, Jason and Eric both had terrible cases of swamp ass.
by Jason Belanger December 08, 2003
when your asscrack/grundel area is so sweaty it basically becomes a boggy swamp. very humid and producing unbelievable discomfort, this condition is generally worse among the fat and lardy. however, in sub-tropical climate locales, i.e. southern louisiana or mississippi, swampass can strike anyone, at anytime. the only relief is to either strip naked and head for a fire hydrant or go home and peel your loins off and drape a cold, wet towel over your nether-regions.
earl walked outside, went to the mailbox, and even at 7:15 in the a.m., fell victim to a putrid variety of swampass....
by dunbart August 20, 2008

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