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 reasons unknown.

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.

another name for genital crabs. Also a name for subway crumbs that fall in one's crotch

The bits of dried lube and genital fluids produced by friction that come off and accumulate on the bed during sex.