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1.
The "ideal" American residential community. More mythical than real; it refers (often with disdain) to a surface level picture perfect life.

So, have you met her parents yet?

Are you kidding? They live in Superbia. Her father wouldn't even acknowledge me.
by Rotivres October 17, 2007
 
2.
A very expensive place to live.
After the bailouts, we corporate execs live in Superbia.
by alpahgrl December 08, 2008