1. Fart, passing gas, flatulence.
2. Smelly air bubble produced from your booty pipe.
3. Angelic music being played from your bum hole.
Person 1 "Do you smell that? Gah, did you fart? It smells awful!"
Person 2 "No" Busts out laughing because their lying and can't keep a straight face. While laughing they let out another fart.
Person 1 "Eww, you farted again! I can feel it on my face! It's like a poof of shit man!"