When you have such horrific diarrhea that the sounds that your ass is emitting sounds akin to free form jazz.
Friend 1: *Shitting his brains out*
Friend 2 to Friend 3: "Damn, did you hear that? Kevin has some serious butt jazz going on right now."
A Chorizo Burrito ordered from Jack in the Box that is double penetrated by two Mexicans working in the back before being served to you.
Friend: "Man, what's with all that grunting coming from the back room?"
Me: "Dude, the cooks are whipping you up a steamin' Hot Carl for sure"