what forms when a child has so much mucus running out of it's nose that it begins to flow out of both nostrils and over the lip and/or down to the corners of the mouth. In extreme cases, this can extend beyond the corners and run down to the chin, creating a sort of "Fu-man choo" style of snotstache.
"Eww...I dropped my kid off at daycare today and that sickly kid with the snotstache was there. I guess everybody's catching something this week!"
A mustache that is only partially grown. It is usually found among guys in high school whom are too unkept to bother shaving before most of their facial hair comes in. Their mustaches look really crappy.