A Shelf Girl is a word used to describe a girl who is used by guys only when they're desperate for some lovin', and haven't gotten laid in quite a while, so they call up a Shelf Girl, and invite her over. After getting some, they casually put this girl back, and completely ignore her until they're ready for another booty call.
Girl: "We totally went to 3rd base last night, we're in love!"
Boy: "Nah, you got it all wrong. He doesn't like you much. I mean sure, you're hot and all, but you're also a real annoyning bitch. You're just another one of his Shelf Girls. Sorry to break it to ya'!"
Girl: "..."
by BottomB January 18, 2010
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