Bun worn on top of the head by scummy women who are too lazy to wash their hair. Usually paired with pajama pants as a low income fashion statement. It is formed by the skank twirling it's hair into a ball and putting a rubber band on the greasy ball.
The Scum Bun is the chosen hairdo of 65 pound crack whores.
by Sweet T Smoove October 1, 2015
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