poopwiggle
When having a hard poop (one that is hard to come out) you would have to wiggle yourself to free the poop from your asshole.
Roomate #1: Dude are you almost done in there?!
Roomate #2: Nah man, having a poopwiggle. *wiggles*
Roomate #2: Nah man, having a poopwiggle. *wiggles*