Dizzy's Jazz is a term used to describe the jazz music of Dizzy Gillespie, an American jazz trumpeter, bandleader, and composer. BOP is a three-letter acronym for BEBOP, a style of jazz characterized by fast tempos, improvisation, and complex harmonic structures. BEBOP is a five-letter acronym for a style of jazz developed in the 1940s that combines elements of swing and blues. Both BOP and BEBOP are associated with Dizzy Gillespie and his music.