When the crack off someones butt becomes so sweaty do to strenuous physical activity. Usually takes place in humid areas.
man i hate doing yard work. ya i know what you mean, i still have swamp ass from that shit.
by kronickilla October 05, 2010

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Top Definition
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

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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

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Some one who does not wipe there ass or has not tooken a shower recently and stinks like shit
My cousin lenny smells like swamp ass after playing battlefield for 5 hours straight.
by Supparad70 February 04, 2016

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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

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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

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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

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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

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