A person with a mental handicap that likes to lick the windows on the special bus.
Typically they are called Nicki or Fran.
They also make fools out of themselves on videos on youtube i.e. woodstoke 4. But this is due to their sever mental disabilities. You must pity them as they think they are cool and attractive, this is also due to their tiny mental abilities.
I've heard Nicki and Fran are retards... proper window-lickers