Backpack

Slang for when a mans testicles slide in betweens his buttocks.

Bob: DUDE, the lifeguard looks like he's got no nuts!
Dave: No, he's just got a backpack.

Martin:FUCK I'VE JUST SAT ON MY TESTICLES AND NOW I HAVE A BACKPACK!

by outoftheblue22 April 13, 2014