someone you know in a class that you'd feel comfortable enough to ask if you could borrow a pencil (paper, calculator, etc), but not enough to hang out with outside of class
person: "I met this really nice girl in my chem class last week, we sit together like every day!"

roommate: "Cool, you should invite her over sometime."

person: "No no..she's strictly a pencil friend."
by joanie30 November 16, 2011
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