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!
by Alex Ostrow April 18, 2006
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 fuckin’ cumstache I left on Miss Stewart made the bitch look like Santa Clause in a snow storm, ho ho ho, bitch!
by Pimp Daddy Chad May 03, 2003
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.
by Knifo August 23, 2011
A mustache of cum after one tries to swallow.
"Man she blew me and got a big ol' cumstache!"
by JCbaybee March 26, 2010
residue from oral sex around your lips.
I got grossed out i saw an old man with a cumstache
by matt + ed March 04, 2004
when a girl gets cum above her lip under her nose, like a mustache
that girl got a cumstache in this porn i saw today!
by mmaaaxxxxxxxxxxx January 18, 2008