When you it's really hot outside and your working up quite the sweat (including inside the crack). When you fart, it creates a scummy bubbly flurry inside your ass very similar to the duck flurry on top of ponds.
ronaldo: damn, it's hot right now
jesus: for reals. i got some mad duck flurry goin on right now
by gregalishus June 21, 2010

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