Sticky residue, also know as semen, left above the upper lip of the person who just gave a blow job. The semen dries to give the appearance of a white mustache. Got cum?
The act of ejaculating while another farts to blow the cum on one's face. Often involving 3 people.
If fart is not strong, the act of ejaculating and farting simultaneously on one person will also suffice.
Chris: Hey I heard Jane is a cum-guzzling slut and also likes sniffing farts!
Willow: Lets put a smile on her face and give her a cummicane tonight.
Bro five!
A: What took you so long to get to the pool?
B: I took a shower before coming out here, I shacked last night and felt icky.
A: Hmm, sounds like somebody had a cummach...
A mustache of semen (cum) that is delacately layed on the upper lip of a female, or in a homosexuals case on the upper lip of a man. This can be licked off by any partner and deposited into a sink or swallowed. Make sure there are no STD's while preforming this sexual activity. Best done after oral sex.
Dude i was gettin head from this chick and i cumed on her face and made a cumstache outta it... it was gnarly. it was a true work of art! She swallowed it and everything!
After the act of oral sex, on occasion the partner's cum is left behind on the upper lip, under the nose. This can resemble a mustache and commonly confused as a milk mustache.
John gave the ho a fancy handle-bar cumstache, paid for her fine services and departed ways.