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1. When the ass cheeks are clenched on a hard seat, gastric gases exit the sphincter and create a firecracker-like sound.

2. When the ass is on a wooden chair and you expel a fart and the fart creeps up the clenched ass crack, it makes a popping noise that resembles that of a firecracker.
Today in 2nd period, I totally lit the firecracker and everyone heard.
by Pflug-Dimond November 04, 2010
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