acting stupid, making an ass out of him/her self, being in a blonde moment, ignorant, neive, an idiot, someone who is clumsy.
Student 2:Nah, but I'm sure Bob will play, he's INSANE at Starcraft.
Student 1:Who's Bob?
Student 2:Oh, you've probably never seen him, he's a gomer.
Anyone with a popped collar at any time
Anyone with an upside-down visor
That guy with the popped collar and the upside down visor with that haircut from Youtube is such a gomer.