The Tibetan Butt Trumpet is when you get ripped with your friends and only have enough cash for some Taco Bell. Whoever passes out first gets a kazoo shoved in their ass and you all laugh like maniacs when they start to fart humming squeezing noises.
Walt came over with s bottle of Jack and we all killed it doing shots. Mike Z passed out dead drunk after 23 shots and 7 1/2 bean burritos. Jackson shoved a kazoo in his asshole and within twenty minutes he was playing a symphony on the Tibetan Butt Trumpet
When someone farts.
It’s a polite way to highlight someone’s flatulence.
(Someone farts). “Calm down trumpet butt”