Top Definition
when your ex tends to try and correct all of the things they did wrong During the relationship after it's over.
Guy 1: "Dude, she's perfect. Why did you break up with her?"

Guy 2: "Don't buy into that.. she just has ex's syndrome; she wants to get back together, so she's trying to be everything she wasn't before."
by TheOtherExGirl March 27, 2011

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