An insult for someone who's acting like an asshole.
You fucking cock brush!
by Kevin Tufo August 28, 2006
A derogatory term for big 70's style mustache.
Hey, look at the cockbrush on that dude in the leather pants!
by nail_bag August 29, 2009
Using a person's penis to maintain good oral hygeine.
Lemme put some toothpaste on your cockbrush. The coarse hairs are really good for removing plaque.
by @non May 10, 2009

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