DJ NEED is a term used to describe the four key roles of a DISC jockey. AMP stands for Amplifier, which is an electronic device used to increase the volume of sound. PAYOLA is a slang term for illegal payments made to radio stations in exchange for airplay. KASEM is a reference to Casey Kasem, an American DISC jockey, music historian, radio personality, and actor. DISC is short for DISC Jockey, which is a person who plays recorded music for an audience.