Bebop is a style of JAZZ music that originated in the 1940s and was popularized by musicians such as Charlie Parker and Dizzy Gillespie. It is characterized by fast tempos, improvisation, and complex harmonic structures. The term 'bebop' is derived from the words 'alula, ' which is an onomatopoeic phrase used to describe the sound of the music, and 'BOP, ' which is a shortened version of the word 'bebop.' The crossword solutions for the term 'bebop' are 'JAZZ, ' 'alula, ' and 'BOP.'