not honest; bull-shit; someone disposed to lie, cheat, or steal; not worthy of trust or belief.
Him: "I swear I didn't sleep with her, baby!"
Her: "You're so mustaches!"

"You know that kid Rick? He's such a f***ing mustache."
by Isabella Hunter March 19, 2009
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A woman that a homosexual man marries or dates to disguise the fact that he is in fact a homosexual.
Andy : Hey Matt, did you see that chick Evan was making out with last night?
Matt : Yeah. What's up with that, yo?
Duncan : Mustache.
Andy : Oh.
Matt : On.
by notpip November 07, 2005
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A creature lurking on men's faces that can only be tamed by razers/shaving cream or mustache combs, and may emerge from noses.
Dude, your mustache is beast!
by Mr. Brader June 24, 2010
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A curvy-ish shape that comes in multiple colors (mostly black). Both boys and girls love mustaches!
I mustache you a question... but I'll shave it for later!
by PipTiff December 20, 2011
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are you going to the cock sucking ralley tonight or are you gonna shave that mustache
by drock August 15, 2004
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Saying mustache is another way to refer to the hair on a females privates.
“Yo, I gave my girl h**d and she had a whole mustache
by This is not ok August 31, 2020
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Tuft hair above the upper lip and below the nose. Usually longer than the rest of the hair on the face and he has no goatee only a mustach.
Stephen has a mustach that he like to gel up.
by Nvode November 27, 2004
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