A "gomper" is a person who is by all means a true retard. They are recognizable by their cro-magnan like sloped forheads, their mongoloid hands, their glazed/slightly askew/mis-shapen eyes, and their gigantic heads. You can audibly identify a "gomper" by their constant "numb-tounge" lisp. Also, look for perma-spit gushing out of the corners of their mouth, and inssesint window licking.
Hey Tanya, did you see that gomper gimp out of that small bus? He almost stepped in his own puddle of drool.