underbite
when you're making out with a chick, and you slide your hands down her pants and pinch her bare ass. UNDERBITE!!! see the intruder...Underbite Chia
Alabama Underbite
When an inbred looking girl without teeth is going down on you and then sucks your balls from below, not under, like a fish to bait.
Example:
Ol' girl was going at me good and then dropped her dentures and hit me with an Alabama Underbite.
Ol' girl was going at me good and then dropped her dentures and hit me with an Alabama Underbite.