Top Definition
A particularly unattractive ex girlfriend or boyfriend who insists on hanging around you and making themselves the center of your attention. The etymological root word is "Cynosure", an object at the focal point of attention.
"I wish she'd just leave me alone, but she's like a Cynosaurus Ex or something"
by neoma82 April 21, 2010

Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from daily@urbandictionary.com. We'll never spam you.

×