Sean George, better known by his stage name Diabolic, is an American rapper. He started receiving fame on the hidden track after Immortal Technique's song "Dance with the Devil". He is also a well-known battle rapper who has battled with rappers such as Immortal Technique, Mecca, and Rhymefest, among others. He released The Foul Play Mixtape in October 2006.

In 2010, Diabolic released Liar & A Thief, which was produced by Engineer with the exception of the song "Riot" featuring Deadly Hunta, which was produced by John Otto of Limp Bizkit on live drums. The album featured guest appearances from Immortal Technique, Canibus, Vinnie Paz, and Ill Bill, and won the 2010 HHUG Album of the Year award. His debut album was also listed on Billboard's R&B/Hip-Hop Albums chart at #76 in April 2010. Diabolic is a member of the Long Island underground rap group Dead Rabbits, which is composed of Diabolic, Nightwalker, Grim, Taboo, Coal, East Coast, Elz Sinatra and Buttatones.