Fart Leper

The name applied to a member of the party sent away from the main group, whether voluntarily or not, due to extraordinary, rancid flatulence.

Bob: Why is Nick sitting over on the other side of the park? Shouldn't he be hanging out with us?
Tom: Ahh, he's a fucking fart leper. Ate beans for lunch and wouldn't stop that farting shit, fuckin' guy.