dirty mustache 

When a man with a mustache jerks off too violently and cums all over his lip fur.

Joe came to work today with a dirty mustache, he must have forgotten to clean up when he was done.

dirty mustache by Cuntpuntking January 4, 2014

Dirty Mustache 

When a person gains the ability to grow a mustache but it's thin and patchy.

John: " Ugh! I wish Michael would shave off that dirty mustache!"
Ben: "Just because you can grow facial hair, doesn't always mean you should."

Dirty Mustache by SuprSaiyanTurry December 26, 2015

A Dirty Mustache 

When a lady shaves her nether regions besides her lips

Guy 1: how’d your date with Stephanie go last night?
Guy 2: ehh, I was about to go down on her, but she had a dirty mustache and it turned me off

A Dirty Mustache by TheBiggetBitchTaco November 14, 2022

Dirty Teen Mustache 

A Dirty Teen Mustache is a mustache that some teenagers thinks looks cool on them, but it doesn't. It's like the kid isn't meant to have a mustache, but he has one anyway. That's called a dirty teen mustache.

bawb: Hey, what's up with the mustache?
John: Oh, right, how's it look :D.
bawb: uh, no. Shave that Dirty Teen Mustache off.

Dirty Teen Mustache by IOA August 3, 2007

Dirt mustache 

A dirt mustache is when you eat a girl's dirty asshole and get residual feces all over your upper lip.

My girlfriend asked me to eat her ass last night and it was dark and when i turned the lights on i had a dirt mustache.

Dirt mustache by RadSpaceman July 13, 2017

Dirty Moustache 

Always on a Female, it's when she first notices small bit of fluff on her upper lip, she then shaves it off- not knowing that for life she is going to have a dirty moustache. She will then try to cover it up with some cheap poundshop makeup.

Look at that Nurse... she's got a dirty moustache

Dirty Moustache by dr_evil123 July 1, 2010