Top definition
The supposed "commoner name" of the reigning Monarch of England, Wales, Scotland, Northern Ireland, and the Commonwealth Realms.

People who call Queen Elizabeth II "Betty Windsor" are either anti-monarchy, small-r republican, apathetic, or satirists.
English monarchist: Her Royal Highness will visit this august country of Canada in a fortnight.

American: Dude, I just go to school here. I'm not Canadian. Why should I care anyway? Betty Windsor's just a person, like anyone else.

English monarchist: How dare you sully our most Serene and Exalted Monarch of the United Kingdom and the Commonwealth Realms with a made-up commoner name!

American: Let's get real. She eats out of Tupperware every morning at breakfast.
by poorbrokegradstudent December 23, 2011
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