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an ex-girlfriend who is now/still a fuckbuddy; an ex-girlfriend to whom you still make booty-calls.
John: Dude, did you just sleep with Jenny again? I thought you guys broke up last month?

Rob: Yeah, well, I still use her for booty-calls every now and then. She's a sex girlfriend.

John: I see...
by Driscool December 11, 2006
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