Slimy Butt is when you can definately feel some moisture collecting in the butt crack, more specifically concentrated around the anus. Slimy Butt is most often caused by a poor job of wiping the butt after a poop. Slimy Butt often leads to Itchy Anus if not attended to.
Johnny-Boy: Aaahhh man, i had such a bad case of slimy butt i had to go wipe myself clean.
Todd: Good work Johnny-Boy, do you feel any better?
Johnny-Boy: You bet! I can finally walk around without an odd sensation in my crack.
The worst possible boul movement of your life, it’s the worst of the worst, hell if it was a shit, your sliding around on the toilet trying to keep traction but all of the feces beneath your ass is keeping you from staying on the seat, your yet to know what happens next, so you accept your fate.
Yo bro that Taco Bell gave me the worst muddy butt slimes of my life.