T/P Share definition Flag Person who has an incestuous sexual relationship. From the cartoon characters in South Park, Terrence and Phillip, who sang Uncle Fucka. I think Rosa is a T/P. She seems to have a lot of skeletons in her closet. T/P by pentozali September 23, 2009 0 0 Get merch Get the T/P mug. Buy Now — $32.95 See more merch