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a unit of measurement; used to indicate a very small distance as related to the small hairs that can grow on a man's dick; used mainly as a construction term.
Hey Bill, how far are we off on that last cut? We were off by just about a cock hair.

OR

Can you move it my way a cock hair.
by Boys of Menom February 13, 2012
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2
Cockhair - the result of a practical joke where waterproof shoe cream is substituted for shampoo causing the victim's hair to permanently take on the appearance of pubic hair.m or said cockhair. Also known as a "Venetian"
After practice Dennis asked to borrow some shampoo, Bradley instead gave him an unlabeled bottle of Venetian Shoe Cream. Afterwards he had a head full of cockhair .
by JJSkidz February 21, 2018
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