One who not knowing the code or combination to a particular slice of ass is nonetheless able to get inside the ass
Frat boy 1: "dude is so wasting his time on lulu bitch NEVER gives it up"
Frat boy 2: "not. Dude is a total ass cracker. He will be in that ass before midnight"
By Rea
Ass Cracker
a cracker that is inserted neatly between ones ass cheeks.
(think the bird in Aladin, the type of crackers that are always being inserted into his mouth by the sultan....now think of those sticking out between ones butt cheeks)