Top Definition
When a man with a mustache jerks off too violently and cums all over his lip fur.
Joe came to work today with a dirty mustache, he must have forgotten to clean up when he was done.
by Cuntpuntking January 04, 2014
When a person gains the ability to grow a mustache but it's thin and patchy.
John: " Ugh! I wish Michael would shave off that dirty mustache!"
Ben: "Just because you can grow facial hair, doesn't always mean you should."
by SuprSaiyanTurry December 26, 2015
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