Kool Keith

Keith Matthew Thornton (born October 7, 1963), better known by his stage name Kool Keith, is an American rapper and record producer from The Bronx, New York. Kool Keith has recorded many things both as a solo artist and with groups. Kool Keith is said to be one of hip-hop's most unusual people.
Kool Keith was a cofounding member of Ultramagnetic MCs. Thier first song "Critical Beatdown" was released in 1988. After two more albums with the group, "Funk Your Head Up" and "The Four Horsemen", Kool Keith released his solo album, "Dr. Octagonecologyst". He released it under the name Dr. Octagon in 1996. He next released a series of hip hop albums. These include "Sex Style", "First Come, First Served" (as Dr. Dooom), and most recently "Keith".
After releasing only one album on a major label, "Black Elvis/Lost in Space", Kool Keith returned to independently releasing music. He worked alone and with groups such as Analog Brothers, Masters of Illusion, Thee Undatakerz and Project Polaroid. Kool Keith has also made guest appearances with Peeping Tom and Yeah Yeah Yeahs. The Prodigy's hit "Smack My Bitch Up" was based on Kool Keith's voice saying "Change my pitch up. Smack my bitch up."