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!
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.
Dude i thought i didnt wipe good after my jog , but it was just swamp ass.