Jizz Sack 

1. Balls; A Boy's Junk; Testicles

2. A Really Stupid Person; A Dumbass.

*Often Associated With a Jizz Stick*

1. He likes it when you cup your hand around his jizz sack.

2. He's such a jizz sack.

Jizz Sack by nYmPhOgUrL April 3, 2010