Undercooch 

When a woman bends over and the back of her vagina is exposed.

Dianah just bent over and all I saw was her huge undercooch!

Undercooch by KG$ January 11, 2009

undercookie 

a cookie that has not been sufficiently baked.

seth: You should take the cookies out.

hannah: No way, man! They are liquid on top! Them bitches be undercookies!

undercookie by squallshaper March 14, 2008

undercock

The male genitalia being viewed from an upward looking angle. Similar to the female version of underboob but with a wiener instead. Also referred to as Australian dick.

I knew I was going to have a rough day when I woke up to my roommate giving me some undercock.

Your mom seemed pretty interested in me so I gave her a little Australian dick.

undercock by nubforce November 26, 2010

undercock

A man who has smaller penis compare to his male friends'.

Tom: My gf thinks I have a big cock but she doesnt know that I am an undercock compare to what my friends are packing
A guy in the forum: Dude you sound so gay!
Tom: No I have seen them naked at the gym and besides I am only 5" long
A guy in the forum: lol you are an undercock indeed!

undercock by jimissobored July 27, 2014

Undergotchies 

The mesh inside of a male's bathing suit that holds his package in place while he partakes in water activities.

Stewart's junk was clearly held close to his body during his cannon ball attempt thanks to his Undergotchies.

Undergotchies by BlackGennies July 7, 2009

Undercooked 

Euphamism for a person who was clearly 'prematurely' born.

A: whats up with Sally i heard she's deaf and blind?
-
B: yeah i think she's a bit undercooked

Undercooked by riverintheroad April 16, 2011

Undercooked meat boomerang 

A blow job position where when the receiver's penis is limp, the giver pushes it in a vertical position with his/her tongue, and let's it fall back down again inside his/her mouth.

"You do positions like reverse cowboy, doggy-style, the chirping chicken and the undercooked meat boomerang."

Undercooked meat boomerang by WantlessPower October 25, 2006