Tuba Tryout

To unleash a shit storm of farts when taking a dump, where the farts are particularly deep in tone like a tuba. The farter would easily get a job playing tuba in the Metropolitan Orchestra after this awe-inspiring tryout.

Ex. 1:
Billy: Damn Benson, what did you eat? You are surely making the Metropolitan Orchestra after that tuba tryout!

Ex. 2:
Ritchie: Where's Mitch?
Wilfred: Tuba tryouts
Ritchie: I'll take a note (no pun intended) to not enter the bathroom where Mitch is...