Top Definition
Mustache rock is genre of music that is made by a band in which one or more member has or at one time had an awesome mustache. Some notable mustache rock bands are: Queen, Portugal. The Man, Gogol Bordello, The Michael J. Epstein Memorial Library, The Black Keys, and Frank Zappa.
Hey man, Did you see that band last week? They were real mustache rockers.
by SoJokes December 28, 2010

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