(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.
When a male enters puberty, a small thin layer of peach fuzz may grow on the upper lip. Some choose to not look like a dick head, and shave it off. Some choose to remain looking like a dick head, and keep that little bit of hair growing until it becomes condensed enough to be visible.
Many times dickstaches are found on Mexicans, Wiggers, and Blacks.