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1.
derogatory term for a severely mentally retarded person.Awindow licker.
Aww look at him on that bus.He looks like he's trying to bite his ear off as well as clean the window.
by adam March 17, 2004
 
2.
Persistent borrower (as cited in Routledge Dictionary of Slang and others)
In the House of Lords, he was surrounded by what the old racing crowd used to call "ear-biters and getabits and chancers".
by etymologist-j February 09, 2009