pre-whip
Pre-whipping is when you pull your penis out of your pants before fully reaching the urinal. It is a fully efficient way to get in and out of the bathroom. You start peeing before you are even there.
Chad: “Bro I accidentally pissed on some dude’s pants”
Andrew: “How?”
Chad: “I pre-whipped around the wall and when I started pissing I accidentally pissed on him.”
Andrew: “How?”
Chad: “I pre-whipped around the wall and when I started pissing I accidentally pissed on him.”