A late night hook-up that you met on tinder (or any "dating" app) and you don't want your roommates to see them because they are well below your usual standards. So you sneak them in through the back door.
Hey Rob! We heard the back doorbandit sneak in last night. How was she? Did this one have both legs?
Noun ~ Some one who actively seeks and violates peoples or sexual partner's anus' for sexual pleasure.
Shaniqua: "So basically yeah, you know Tyrone? Yeah he threw me on the bed when we was gettin' freaky yeah and slid in all Snake like a Back-DoorBandit fam and he was sweatin' and wheezin' all over me yeah you get me?"