When you dont wipe your butt properly and after three or four days it dries up to form hard, crusty, crumbs.
Hey, I never took a shower in three days, and my girlfriend gave me a rimjob, heh, now she has doodoo crumbs all over her face giggity giggity gig-aaa-deee
by Cunt muscle December 29, 2004
Small, dried up pieces of doo doo which can be found caught in corn hole hairs (along with TP niblets), behind toilet bowls, and in toothbrushes.
"There are doo doo crumbs caught in my ass hair."
by Marcus G September 20, 2007