When you hold in a poop in a car with the seat heater on and your poop starts to water down and it runs down your butt.
"OH SHIT SON IM STARTING TO GET SWAMP ASS"
When it’s hot and you’ve been sat down for ages causing your bum to sweat lots
person 1: “Hey I’ve been gaming for hours and my bum is wet”
Person 2: “You my friend have got something called swamp ass”
The term used for when your ass starts to sweat intensely. Swamp ass is a living nightmare. It makes your ass smell like you just sharted. It's gross, and is a reason to wipe your ass like you wipe your floors.
"Sat down with swamp ass for the entire day. Now every seat I sat on smells horrible."
"I feel you, man. I had a hot girl next to me once. Needless to say, swamp ass ruined everything."
noun - a vaporous secretion from a described heinous anus that in return punishes its sender.
Colt released karmic swamp ass upon himself.