KRS-One

Lawrence "Kris" Parker (born August 20, 1965), better known by his stage names KRS-One and Teacha, is an American rapper, lyricist, and producer. He received the Lifetime Achievement Award at the 2008 BET Awards for his work in the Stop the Violence Movement. In 1987, he formed the group Boogie Down Productions. 
His stage name (KRS-One) stands for Knowledge Reigns Supreme Over Nearly Everyone.