When a persons hair is much too long for the taste of all of his peers but still insists on keeping the "Mop" on his head and let it consume his well being. This person is usually a gamer that doesn't leave his room unless he is hungry or thirsty. This person could also be referred to as an Xbot.
If someone who had a mop on their head cuts their hair it then becomes a mop.
Person 1: Did you see Michael cut his mop off his head?
Person 2: Yeah but he still has a dustpan on his head.
Person 3: Yeah it doesn't look right on his head.