crusty crack
when ur ass is hairy, sweaty, and moldy and has acne from cheek to cheek.
hey crusty crack! wash ur ass!
crusty-crack
when you either shit urself or u don't wipe ur ass and it crusts over creating a hard brown surface of shit (it usually covers ur asshair)
after john had an assplosion in my ass, i did not wipe it off and i got a crusty-crack