its when someone fart on your butt and it get crust in your butt crack. Or you don't wipe your self good
by riyriy December 9, 2019

by EmilyDontLie October 18, 2019

Someone who is actually normal and lets it crust after dropping a deuce. Basicallly, they NEVER wipe. sure it starts to itch and it builds up over time, leaving stains on your u derweat, but thats just proof that you're a crust king.
by BigMamaBS July 24, 2025

by susie.early August 29, 2022

(n.) dried man drippings usually found on fabric that was near a bloke’s knob just after he has splooged. Cum crust often exposes cheaters or serious bators. The typical “cum rag” (which can be a towel, a t-shirt, or a sock, among other things) is usually completely saturated with a cum crust.
“His dirty socks are always covered with a cum crust and stuffed under his bed.”
“After a night of heavy petting, my pants ended up with a major cum crust that you could see when I walked home.”
“After a night of heavy petting, my pants ended up with a major cum crust that you could see when I walked home.”
by Frozen Prevert October 15, 2024

the crust formed inside the stomach when mold inside of your stomach reacts with your stomach fluids. scientifically known as belingus crustacean
by globlinn February 10, 2024

by Veronicalodgetisdall June 17, 2018
