Top Definition
1. Noun. Dried out semen that has been shaken off ones wank rag.

2. Noun. When one spaffs into a girls hair and the said emission dries into a thick crust
Jimmy inhaled a small cloud of cumdruff after billy flailed his wank rag in the air.

After Adam spaffed in Katie's hair she had a hell of a job washing out the cumdruff.
by James walker January 28, 2006
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