when finished urinating, one can shake by simply gripping the elastic of the boxers with the thumbs and middle fingers and simply pull up and down on the elastic, shaking your wiener and flinging piss off in all directions.
most appropriately performed outdoors or in bathrooms at fast food restaurants
(Bill and Steve's conversation after Bill, who was shitting in the stall, and Steve, who was pissing in the urinal beside the stall, leave an Arby's bathroom together and sit down to eat)
Steve: (reaching in for one of Bill's fries) Can I have a fry?
Bill: you can eat shit and die. I never saw you wash your hands before we left the washroom.
Steve: dude, its fine, I hoe-down pissed
Bill: alright then , yes, you may have a fry. but only one. or ill skull fuck you.
Bill and Steve: (highfiving) hoedown piss!