Kurtis Walker, professionally known by his stage name Kurtis Blow, is an American rapper, songwriter and record producer. He is the first commercially successful rapper and the first to sign with a major record label. "The Breaks", a single from his 1980 self-titled debut album, is the first certified gold record rap song. Throughout his career he has released 17 albums and is currently an ordained minister.

Rapping is an artistic form of vocal delivery and emotive expression that incorporates "rhyme, rhythmic speech, and [commonly] street vernacular". It is usually performed over a backing beat or musical accompaniment. The components of rap include "content", "flow", and "delivery". Rap differs from spoken-word poetry in that it is usually performed off-time to musical accompaniment. It also differs from singing, which varies in pitch and does not always include words. Because they do not rely on pitch inflection, some rap artists may play with timbre or other vocal qualities. Rap is a primary ingredient of hip hop music, and so commonly associated with that genre that it is sometimes called "rap music".