DFD (2011) (#6 Heatseekers Albums, #41 Top R&B/Hip-Hop Albums, #24 Rap Albums). Jonathan Park (Korean: Park Sung Man) (February 18, 1986), better known by his stage name Dumbfoundead, is a Korean American battle rapper originating from the Los Angeles Underground's Project Blowed. He is well known for his affiliation with the West Coast division of Grindtime and his participation in Jumpoff's 2007 World Rap Championships; both of which have given rise to his status as a strong web presence. He did a stint as the opening act for Epik High's Map the Soul tour. Dumbfoundead is a member of the hip hop trio Thirsty Fish and the Los Angeles battle crew the Swim Team.