by Ian January 30, 2004

A: Yo dog, I can't believe you just ball-tapped me from behind, you got all back-sack.
B: Ew, check out that old guy's back-sack hanging out of his pants.
C: Check out Katz's shaved back-sack.
D: Mom, Jacob put his back-sack on my face.
B: Ew, check out that old guy's back-sack hanging out of his pants.
C: Check out Katz's shaved back-sack.
D: Mom, Jacob put his back-sack on my face.
by J'Nathan Bo'Jingles May 25, 2008

by D0c February 24, 2006

Used as an insult for when someone is being more then a douche. Condoms have cum inside them after being used, thus making it more disgusting and just gross. A large sack of them is a lot worse then a douche.
by Kisma'as October 25, 2009

The untanned spot left on your inner thigh from where you testicles (aka ball sack, balls, sac, bag etc...) were lying when tanning or nude sun bathing.
"I kept moving my balls around while tanning to prevent sack shadow."
"I hate when I see him in briefs, his sack shadow is obvious."
"I hate when I see him in briefs, his sack shadow is obvious."
by muckwa July 7, 2012

To masturbate at such a high speed that your hand smacks your scrotum and makes a wet smacking noise.
by The Guy1 412435235235 January 10, 2009

by Chanotaka21 February 19, 2011
