Douglas Harper's Etymology Dictionary
jazzbo
1917, "low, vulgar jazz," from jazz. Later in 20c. in use as a derogatorty term for persons, especially blacks.
Wiktionary
jazzbo
n. (context colloquial English) A jazz musician.
Usage examples of "jazzbo".
The only known Goines associates who knew of Mad Marty’s demise were the jazzmen he had questioned, which eliminated jazzbos as suspects--with Goines ID’d by the law, no smart killer would bring future victims to the man’s apartment.