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A significant other or main squeeze that is totally a figment of one's imagination. i.e. they are all in your head. Usually a celebrity crush.
Chick 1: Girlfriend, you know that I had to catch that new Keanu Reeves flick!

Chick 2: Dude you watched a Keanu Reeves movie? Oh...I forgot, he's totally your figboo...

Chick 1: Yep Yep! Gotta support my boo...

by lady lynxx March 25, 2009
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