1 definition by Adam Secum

Top Definition
A one time girl who comes about abruptly and wants to hook up with you. You have two options: you can exit the pop up (telling that girl hell no) or you can click on it (getting with the girl) and after leaving on the street like a piece of trash.
Bob: I was on facebook and there was this girl who kept talking to me.

Friend: Dude she is defiantly a pop up
by Adam Secum March 19, 2011

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