Jason Martin (born May 8, 1985), better known by his stage name, Problem is an American rapper. He has released nine mixtapes in his career with the most recent being The Separation which was released on June 13, 2013. His debut retail project, an EP named Understand Me, was released on December 10, 2013. He is best known for his single "Like Whaaat" and for featuring on E-40's "Function".