what you do when you see someone you don't want to see; a fake mustache, using your finger.
"Shit, there's Bob! I'm gonna do a finger mustache, so he doesn't recognize me!"
by Clarice54354 October 13, 2008
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When you get a tattoo of a mustache on your finger.

Mostly intended for comedic purposes.
"Your new finger mustache tattoo is too funny!"
by BlitheNIne December 28, 2015
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When an individual licks the tip of their two fingers, straightens their mustache with said fingers and proceeds to insert these fingers inside of a vagina while licking the clitoris.
by metalive69 August 29, 2015
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A friendly taunt of gesture made to a friend for no other reason than you can and its funny.
Put your index finger sideways under someones nose and say "mustache finger?" if you succeed and get them you will win bro points... if they somehow avoid your attempt they get bro points.
by Slang Master Zen November 18, 2014
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