Windowlicker

[Sonia]

noun: A windowlicker is a derogatory, informal description of someone with severe learning disabilities and/or a physical incapacity which renders them helpless when faced with the prospect of seeing a stranger through a window without smearing their mucus covered tongues all over the glass, possibly as some kind of retard greeting.
Alternatives are spaz or mongole.

[Luis Fok]

Common term used to describe a retard.

[Jason Yan]

A song recorded by [Aphex Twin]

[Becky]

a person who wears a helmet on the little bus to school . While looking out the window at whatever proceeds to lick the windows on the bus