Jack-Stalling
When you wank off in a bathroom stall like it's your full-time job and you're not even trying to be stealthy.
I was in the middle of a Jack-Stalling session when the stall next to me decided to join the party.
He was so loud during his Jack-Stalling that the whole mall heard him.
Jack-Stalling so hard, the toilet paper started to fall off the roll.