When a man does not wash his genitals resulting in a cheesy smell coming from the underside of the testicals.
"I need to take a shower, I have a cheesy sack!"
When a man steps into a wet or cold environment and the skin on his testicles shrink. This causes the sack to form into one mono-nut.
Dude it’s cold as dick out here, I have a major yoshi sack going on in my pants right now
When a man gets nervous or cold and his testicles form into one giant nut.
Yo dawg I have a major yoshi sack going on in my pants right now.
When your hands are wrinkled so much that they start to look like the surface of the scrotum
Person 1: I just got finished with my dishes shift, my hands are so wrinkly!
Person 2: Yeah i hate Sack-hands!
When you pull your nuts out over your pants and drop them in front of your belt buckle.
My balls needed more adequate sunlight, so I made a ball sack belt buckle.