to pull back the scrotum with a pliers until it is directly over the anus, then punching it into the anus (you might want to wear gloves); approximately equivalent to 1000 punches in the shoulder.
by da baron November 05, 2009

A small pouch that is formed when someone is continually done in the asshole. Usually fills with anal secretions and all kinds of nasty shit, including old, rotten, cum.
1. Oh shit, my butt sack is full again. Hold on while I go squeeze it out.
2. What's that gay kid doing?
Itching his butt sack.
EWWWW!
2. What's that gay kid doing?
Itching his butt sack.
EWWWW!
by Andy Licious September 28, 2006

The fat that rolls over when you wear too tight of jeans, which shapes the form of looking like a fleshy sack, often refered to as "muffin top".
"Jennifer Lopez's butt sack pops out everytime she puts on a pair of jeans, causing rolling blackouts in Southern California"
by K dizzle forizzle nizzle shizzle biz nog April 10, 2008

by V-Man April 20, 2005

by joe peterson August 15, 2006

by Wekranian July 03, 2009

When a guy who is naked bends over and you can see his sack hanging between his legs, beneath his butt.
by stud masterson April 11, 2008
