Definitions by Yuri Gellar

buttcrack bandit 

an act durring intercourse when a male unknowingly inserts his penis in the females buttocks crack; all the while he believes his member is in the vagina.

P.J. Brunson chugged two forties and pumped her crack. He's a buttcrack bandit.

buttcrack bandit by Yuri Gellar November 8, 2003