2. Someone who just committed a foolish or stupid act and should therefore feel sheepish.
When one feels as though words describing douchebags or fools become boring and trite as they often do, the logical solution is to stay ahead of the curve by employing newly formed words, sometimes out of accident. Hence, "gumper".
Girl: Did she die?!?
Dude: I don't think so. But what a gump. Just a gumper.
Girl: You're a gumper.
2. Waitress: You have a good meal!
Guy Diner 1: You too!
Guy Diner 2: "You too?" Are you kidding me? You're just a gumper, bro. A total gumpz. Watch out for the gump truck.
Guy Diner 1: Aww, come on Jerry, cut it out!
Guy Diner 2: GUMPSTER MCDUMPSTER!
Guy Diner 1: I feel sheepish.
Someone who is "Gumpy", lengthy, tall, uncordinated kind of person.
One who's some what like a loser, or a dork.. somebody who falls alot, clumsy, etc.
Yo' that basketball player sucks, he's a major gumper.