Some one who is an anti-social shut in. They also believe themselves smarter than all others and dress shittly. Someone with an extremely large ego, and yet no girlfriend.
That assfuck is such a Hampinator - he just sits in his room jacking off and telling himself he's a god.
Lumpy was a nickname given to a large stocky man ( 6'-6" 400lbs ) in upstate NY and when he was called upon by his friends to settle a depute they called him the Lumpinator as a reference to the terminator