an alternative term for the act of jelqing, a Middle Eastern penis enlargement technique. Though originating in the Middle East, scrumping has become extremely popular amongst males throughout the world. The method is intended to enlarge the penis by exercising the smooth muscle and other tissues in the penis, with the goal of permanently increasing the maximum erect size of the penis. Scrumping is alternatively referred to as "penis milking", "dong stroking", and "rod rubbing".
Man 1 at urinal: "Jesus Christ man what'd you do to your dong?! It looks like you're smuggling a python!"
Man 2 at urinal: "Sup. It's pretty big, huh? It used to be a tuna can, exact dimensions. But after months of dedicated scrumping, I've managed to produce this piece of penile perfection.