Robert Cooper Phillips (April 27, 1975 – October 9, 2015), better known by his stage name Koopsta Knicca, was an American rapper. He was best known as one of the members of the Memphis rap group Three 6 Mafia, as well as a member of the rap collective Da Mafia 6ix alongside DJ Paul and Crunchy Black.
Phillips joined the Memphis rap group Three 6 Mafia in 1991. According to Lord Infamous, he went to the same high school as DJ Paul and later Juicy J. He was featured on numerous Three 6 Mafia albums including the platinum-selling When the Smoke Clears: Sixty 6, Sixty 1. He left the group after the release of the album in 2000 due to his incarceration, which made him unable to make shows and videos in addition to breaching his contract with Sony. DJ Paul issued a statement regarding Phillips’ death and mentioned that they were in the process of starting what would have been his 11th solo album, Da Devil’s Playground 2, shortly before his death.