Roo-IN-ing Share definition Flag To rub or thrust one's pelvis repeatedly at Owen's ass on a webcam. At parties, his friends frequently complain, "MAN, stop roo-IN-ing everything!" Roo-IN-ing by Andrew April 21, 2003 0 0 Get merch Get the Roo-IN-ing mug. Buy Now — $32.95 See more merch