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1.
1. Detritus on and around the penis and testicles caused by not showering or bathing.

2. A completely unnecessary and unwanted thing or person.
1. She unveiled his throbbing manhood only to see it was covered with cock dust.

2. He was a complete idiot, ruining the whole plan. Total cock dust.
by Nubba The Wandering Minstrel April 11, 2007