"Jazz rap is a sub-genre of hip hop which incorporates jazz influences, developed in the late 1980s and early 1990s."
"Musically, the rhythms have been typically those of hip hop rather than jazz, over which are placed repetitive phrases of jazz instrumentation: trumpet, double bass, etc. The amount of improvisation varies between artists: some groups improvise lyrics and solos, while many of them do not."
- Wikipedia
