when a girl takes your balls and tucks them into her cheeks, causing her to resemble a chipmunk

When a guys pants are hiked up severely in the front, so badly that it presses his nuts out to each side, therefore creating the look of a chipmunk with it's cheeks full.

To stab a girl's crotch violently with your penis.
It must go all the way into the crotch for it to be a "chipmunk"

A boy that is really arrogant, desperate for a lay, and generally a BASTARD.

This guy Chris joined my circle of friends but we found all he wanted was someone to fuck.

A sexual act that occurs when a guy puts both of his testicles in his partners mouth, one in each cheek, and puts his penis down the back of his partner's throat.

a small, skinny, food-deprived creature with two buck teeth.

chipmunk - usually fatter women who very fat cheeks