A poor excuse for a mustache, generally sported by: military personnel,
awkward loser teenagers, trailer
trash, rednecks, Mexicans/Latinos, and/or police officers. A trashstache is typically worn by men that lack the balls or coolness to wear a characterful mustache, i.e. handle bar, 70's pornstache, freak-show carnival announcer stache, Hitlerstache, 18th century safaristache.
I saw a poser gothic
teenager at the mall today. He was wearing an Insane Clown Posse t-shirt, baggy hot topic pants, had a crew cut, and trashstache.
Military men trying not to look stupid with a high and
tight or trying to blend in with
society grow trashstaches.