The act of checking ones ass crack and general crotch area for sweat or other moisture by visiting the bathroom and swiping the area with toilet paper, paper towel, tissue, or other form of absorbing material. See swamp ass
After an evening of dancing at the club on a hot summer night Darrell heads to the bathroom for a swamp check
(in the unlikely event that he takes home a woman and gets lucky) He hopes to avoid any embarassment that could arise due to the swamp ass
that has accumulated in his crack and crotch.