When your face gets dirty and there's a shadow of dirt on your upper lip giving the appearance of a mustache made of dirt:
by RedBombshell February 24, 2015
Get the dirt-stachmug. A mustache you gain from the foamy goodness of a guinness beer, or Something a guinea pig might have
Look at that guys guine stache, he must love that beer!
Look at that cute guinea pig his stache makes him look so much cooler!
Look at that cute guinea pig his stache makes him look so much cooler!
by Zombie25 June 26, 2010
Get the Guine Stachemug.