"Goof monster" is a term set aside for only the lonleyest, dumbest, most annoying, most retarded person you can think of. Everyone has their own "goof monster" in their life. It could be your boss. It could be your cousin. It could be your great aunt Hilda. It doesn't matter. There's ALWAYS one there. You can easily identify a "goof monster" in a group of people, because they will be the one alone, away from the group of people. If you find yourself in a situation where you might consider yourself a "goof monster", please, do everyone a favor, and go die, because NOBODY likes "goof monsters." The term "goof monster" does NOT describe someone who is goofy, but someone who is simply retarded. This world is crawling with "goof monsters", so watch out!
Oh my god, you goof monster!!! Get away from me, you don't have any friends for a reason!