Old man: "Go away! Celebrations are for sissies. If I had it my way, I'd put all of you runts in the slammer!"
Jake: "What's his problem?"
Bobby: "Don't mind him, he's just being a crotch crumb..."
Jane: "Would you rather dive into a pool of snot, or sleep with 'funky Jake'?"
Jenny: "Eww, gross! I hear he's got a major grody case of crotch crumb."
The toilet paper crumbs that seem to attach themselves to your pubic hairs after wiping. They live in there and fall out at a later date, i.e. shower, next bathroom break.
These are the crumbs of food that miss your mouth and fall into your crotch. Crotch Crumbs occur most often in movie theatres, dark-lit rooms, and most often when one viciously shovels food into their mouth for reasonsunknown.
'Hey, Ron. Can you pass me the popcorn?'
'There's none left in the bag but you can have my crotch crumbs'.