a method of dealing with an itchy scrotum wherein the scrotum is flipped to expose the itchy location and then the back of the fingernails are dragged across the area, thereby relieving the itch.
Compare: pinch and roll
Dude #1: "Dude, this itch on the underside of my bag is driving me crazy."
Dude #2: "And you think I care?"
Dude #1: "I've gotta do something about it -- I'll try the flip and drag."
Dude #2: "Whatever, dude."