When somebody does a line of coke and you see the powder on the underside of your nose
Person 1: Good morning bro, hey, you got a milk mustache going on there.
Person 2: No wonder why my dad was giving me a funny look
by Big Moist Daddy July 17, 2018
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a trail of seamen on a girls upper lip
she blew me until I gave her the ole milk mustache.
by Hairy Palmer January 24, 2003
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When dogs reach the certain old age and start having white hair on their face.
Your dog is very cute! i can see he has some milk mustache
by Foxicc_the420 March 26, 2020
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When getting a blow job the girl puts the dick on her upper lip when you cum, and lets the cum run down the sides of her lips.
Last night my girlfriend gave me a blow job, and i gave her a milk mustache
by Psyco6 February 3, 2012
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a residue of vaginal secretion remaining on the upper lip of the performer's lip after performing cunnilingus.
"Oh man, she enjoyed it so much that she gave me a milk mustache"
by milky-way October 5, 2016
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After a girl is done giving you a blow job, and your ready to cum, you cum on her upper lip. This will give the appearance of a milk mustache.
I'm gonna give that bitch a milk mustache tonight!
by TBKowns September 27, 2010
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Once your done giving head to a guy, you pretend that you swallowed and make him think your just going to give him a kiss on the cheek goodbye but when you get closer, you spit it back on his upper lip.

(this is mostly used for revenge when a guy doesn't give you a hint he is going to cum)
"Ahh, that guy last night cummed in my mouth without telling me when it was going to happen, so I gave him a milk mustache."
by Jwizzzle16 December 29, 2010
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