Window licker 

A person of limited mental capacity who licks the windows of a short bus.

My friend Joe is a window licker.

Window licker by Bearmama May 3, 2016

window licker 

(derogatory) ~ sl.: euphemism for a person of mentally challenged status. Etymology: C20 - Derived from the stereotyped behaviour of mentally challenged people, observed to place their open mouths into prolongued contact with the external windows of public or private transport on which they are seated.

It is offensive and wrong to name a person people who is mentally challenged a 'window licker' or a 'retard'.

window licker by zalzalahbutt November 25, 2006

window licker 

Mentally retarded child licking the window of his school bus while watching the outside world.

What are you, a window licker?
He is so stupid. He must be a window licker

window licker by mrkungfu0812 July 30, 2010

window licker 

A mentally challenged person riding on "the short bus".

aka: Adams or Negative Waves

The window lickers on the short bus have faces pressed against the window with their tongues hanging out.

window licker by Ann Onimuous December 3, 2003

window licker 

a mentally challenged person, a mentally retarded person(derogatory)

That kid is nothing but a window licker.

window licker by Light Joker June 10, 2007

Window Licker 

A child with a disease in the head; One who rides a short bus

Mayor Wright Loves Window Lickers

Window Licker by Mayor Wright October 24, 2018

Window-Licker 

An offensive term meaning a retard, someone who licks windows.
Comes from when people with learning disablities etc go on coach trips, it is a common belief that they lick windows.

Random kid 1: *Falls over*
Random kid 2: God, you're such a window-licker!

Window-Licker by JeffIsGoingToHell August 20, 2009