At the July Barflies.net Geek Out Party, I asked for everyone to tell a funny story. Dave Irish and Matt Salamanca told us the slang for bodily functions that come up in a tour van and amongst boys (or in "Something about Mary":

Buke : Burp and a small amount of puke comes up.

Scrotch : scratch your crotch.

Shart : Fart plus... you figure it out.