Definitions of jazz:

noun: a style of dance music popular in the 1920s; similar to New Orleans jazz but played by large bands
noun: a genre of popular music that originated in New Orleans around 1900 and developed through increasingly complex styles
noun: empty rhetoric or insincere or exaggerated talk
Example: "Don't give me any of that jazz"
verb: play something in the style of jazz
verb: have sexual intercourse with