Buntsack 

Area between anus and testicular "sack." This includes the crack and cusp of the butt cheek between the anus and balls.

My girlfriend really wanted to just kiss my balls and shaft, but I pointed in a circular motion from ass cheek, to ass hole, to other ass cheek to ball sack and said:"No, get the WHOLE buntsack."

Buntsack by Caped Bunt Boy June 20, 2012

vestigial buttsack 

When a person is born with the parts to form a butt (butt cheeks) but no flesh ever properly forms in it, so that the prson doesn't have the natural roundness of a butt and are therefore forced to sit on the extension of their thighs for lack of a natural butt. Or in simpler terms- lack of butt meat.

Hold on, is that Crystals's thighs or just her vestigial buttsack that's creeping from the top of her jeans when she bends over?

vestigial buttsack by Zoraya M May 19, 2008

peeing your buttsack 

When someone has taken a pee and it has overflowed the buttsack.

Hey man, quit peeing your buttsack!

peeing your buttsack by The real mike jones November 14, 2014

buttsack 

A word with no true definition as a noun, but is generally used as a word to throw people off when a question is asked that the person doesn't want to answer and/or might be dangerous to answer.

Woman- "Do these pants make me look fat?"
Man- "Buttsack."
Woman- "What?"
Man- "Buttsack."
Woman- "...What were we talking about, again?"

OR

Girlfriend- "Do you love me?"
Boyfriend- "Buttsack."
Bystander- "...Did he just say 'buttsack'?!"

buttsack by 42Geek July 31, 2010

buttsack 

when someone bends over and you see his balls hanging near his ass like a dog

That man just buttsacked me!?

buttsack by rOBOT April 22, 2003

Buttsack 

An adjective used to emphasize how you are feeling or how someone else is acting. Usually a negative connotation.

That guy over there plays football like a buttsack

Buttsack by Mr. Sizz August 2, 2010

buttsack 

A hidden sack near the buttocks used in various forms of sexual pleasure. The most sensuous part of a woman's body.

I fingered her buttsack all night and she loved it.

buttsack by None Genuine February 22, 2010