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1.
A somewhat derogatory term referring to Orange County, California. It refers to the idea that people living there long-term are spoiled, ignorant, and have little experience in the world outside of the immediate area, besides occasional trips to similar locations around Southern California.
Buffy grew up living behind the Orange Curtain, and thinks everyone from other places are trash.

Steven only leaves the Orange Curtain once a year for a snowboarding trip with his rich friends at some fancy resort in Norcal.

You can always tell someone grew up outside of the Orange Curtain when they refer to OC as "The OC."
by DogBelly September 10, 2011