Top Definition
A move performed by moving your anus cheeks during a fart to effect its sound.

This can only be done on farts longer than six seconds and usually involves changing the pitch or vibrations of the fart.
Pfffffttttttttt-Paaaaaaaangggggggg

Dude, did you hear how great my fart tweaking was there? It started out all soft and then I tweaked it to get some nice bass and great volume.
by The Earl of Breezer May 12, 2007
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