n. A relatively uncommon euphemism for powder cocaine, originating from frequent and heavy use by many musicians in the heyday of jazz.
Mark: Let me get a lil' more of that yayo.
Sean: Haven't you had enough of the jazz salt yet, you dope fiend?
Sean: Haven't you had enough of the jazz salt yet, you dope fiend?
by Em Epher May 3, 2008