Greek Mustache 

When one, after anally penetrating one's partner, wipes one's fecal encrusted member across the partner's upper lip. Also called a "Dirty Sanchez". Can also be called a "Trojan Mustache", if partner is unsuspecting.

Rob: I was having sex with your mother last night and she surprised me with a Greek Mustache.
Bob: How dare you! In that context it's called a Trojan Mustache!
Rob: Sorry. Either way, your mom's got a dick. Not cool.
Bob: How dare you! ......!

Greek Mustache by Urple September 4, 2006

Greek mustache 

The act of performing oral sex on a man or woman who as Greek yogurt spread over their genitals. When the act is over it leave one, with a mustache made of yogurt

Bro. Last night Stacy surprised me with the Greek mustache, it was amazing.

Greek mustache by Cummingbirds February 8, 2022

Green Mountain Mustache 

Being on the recieving end of a St. Albans Snickers

Dude, my face is so chocolately from that St. Albans Snickers, do I have a Green Mountain Mustache?

Green Mountain Mustache by Dorkus Vermontus October 15, 2008