A person whose extended gastrointestinal tract resembles the exaust system (or lack there of) on a "suped-up" '84 Oldsmobile Cutlass Supreme. No catalytic converter, resulting in that oh-so-familiar rotten eggs smell. No muffler, resulting in a rumble that can shake the neighbors oregano off of their spice rack.
"Have you ever had to share a hotel room with John? Dude's a straight piper...It's impossible to get any sleep with the noises and smells that leak from his body"