wu pi pi Share definition Flag A trend that started at a local university, where a roomate and a gay friend, violate and anally rape a second roomate, while the third roomate is not in town. "Hey lets rape the roomate, since he has no witnesses; it will be a wu pi pi." wu pi pi by T-More December 20, 2007 0 0 Get merch Get the wu pi pi mug. Buy Now — $32.95 See more merch