An itchystreak of fecal matter that stretches the length of your buttcrack.
Andre: Man, I sure got sweaty hiking this trail in 90 degree weather. I need to stop off at the brook and scrub off the devil's moustache. I have not showered for days on this camping trip.
Brock: Make it snappy, we need to make camp yonder before the sun sets.
Andre: Sure thing. I will use my underwear to scrub off what I can and go commando the rest of the way.
Brock: Don't forget to use your hand sanitizer before you make our sandwiches.
it is a Moroccan @ nickname, which defines a man who loves boobs a lot.
Another definition: the mustached man is a man who appreciates the art that the woman's body gives off