Jacksonville Jock-Strap - You pull that flabby skin from your sack and cover your whol

You pull that flabby skin from your sack and cover your whole grundle like a failed science experiment.

I did the Jacksonville Jock-Strap during a bathroom break and got caught by my teacher.

My friend did the Jacksonville Jock-Strap and his whole class started a chant.

I did the Jacksonville Jock-Strap so hard my jock-strap broke.