Little pieces of crustified shit that dry on the tips of anal shrubery

Commonly used to refer to sticky shit stuck on asshole hairs. see dingleberry
But can be used as a deraugatory term to describe someone tailgating you.

a crusty piece of crap. also known as christina w.

nasty piece of shit that smells bad

poopy crumbs caught in your butt hair

Nasty pieces of poopoo that just will not come off my butthole!