Marvin Watson Jr. (born March 19, 1976), better known by his stage name Messy Marv, is an American rapper who moved to the Fillmore District of San Francisco, California after graduating from Mt Diablo High in Concord and living in Pittsburg with his alcoholic father who moved to Fillmore after Marv graduated and kicked him out He is the cousin of San Quinn, Stevie Johnson, and Ya Boy.