Phat dunn Share definition Flag A term used to describe a gay kid or a kid who is involved with other memebrs of his family Hey did u hear tommy had sex with his cousin Yes i did hes such a phat dunn Phat dunn by the G of great worthiness February 10, 2009 0 0 Get merch Get the Phat dunn mug. Buy Now — $32.95 See more merch
