(n) A five o'clock shadow above the upper lip that looks like a line of dirt, rather than a moustache. Usually seen on greasy adolescent boys. Not uncommon in women.
Joe shaved and shaved his upper lip so he could fit in and have a moustache like Pedro. Well indeed Joe was not as hairy as Pedro, and developed only a dirt stache instead.
by gafhater August 13, 2004
by 79xx April 27, 2017
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