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A monstache is a giant, possibly scary, mustache.
Shaun - Look at that guy's huge mustache!
Zack - No dude, that's a monstache! RUN!
by The Owens September 11, 2007
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2
A monstache is a giant, possibly scary, mustache.
Shawn - Look at that guy's huge mustache!
Zack - No dude, that's a monstache! RUN!l
by JZ7 April 25, 2011
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