Robert Cooper Phillips, better known by his stage name Koopsta Knicca, is an American rapper. He is best known as one of original members of the Memphis rap group Three 6 Mafia. He is now a member of the new rap collective Da Mafia 6ix alongside DJ Paul and Crunchy Black.He released a solo album produced by DJ Paul, Da Devil's Playground in 1999. Cooper left Three 6 Mafia in 2000 because he was unable to make shows & videos being in trouble with the law.