White Man's Under Bite 

Found predominately in rednecks – when the lower teeth grow or extend past the upper teeth. This condition, if not fixed at a young age can cause digestion problems and also increase the risk of biting one’s own tongue.

Did you see Billy?

No

He has the White Man's Under Bite! Damn!

Yea, dipshit bout bites his tongue off when he smiles...

White Man's Under Bite by B. Hanback January 22, 2009

Underbite Chia 

Someone who has a major underbite with crooked teeth. And chia pet hair.

Wow! what an underbite chia you are!

Underbite Chia by shrogor cheet January 8, 2020

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.

Ol' girl was going at me good and then dropped her dentures and hit me with an Alabama Underbite.

Alabama Underbite by Hoodlum Crew April 19, 2019

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...

i gave my roommate's mom the underbite last night.

underbite by nate fingerman July 17, 2006

undervite 

the most minimal form of an invitation, but not quite reaching the level of an unvite. used to make an offer, while indicating that ones presence is not mutally desired. frequently used by a couple to a potential third wheel. commonly phrased by using "if you want."

me: kim and i are going to the bar around ten. you can come too, if you want.

you: dude, that was such an undervite.

undervite by snizzy11 July 23, 2010

underbitch 

a woman who makes it against all odds. in a world of dog eat dog and winners and underdogs, more obstacles still are stacked against underbitches

The history of philosophy is full of remarkable underbitches who even today enjoy less recognition than their male counterparts despite being major and influential thinkers.

underbitch by @thePiraeus December 4, 2016

underbitch 

below a bitch, a guy who has emotions that are far more sensitive than a woman.

I broke up with my man & now he's acting like a straight up underbitch.

underbitch by Tammy, Myisha October 19, 2006