How did Dizzy Gillespie get his name?

Dizzy Gillespie was born John Birks Gillespie.

Nicknamed Dizzy because of how he acts during performances, Gillespie set new standards for trumpet players with his innovative rhythmic and harmonic explorations. This definitive change moved American jazz from swing to 'bebop'. Together with Charlie Parker, he was a major figure in the development of modern jazz.