Top Definition
A person you meet at an event or bar who is cool to hang out with at the time but you never talk to or hang out with again. A throw away friend.
He was really cool at the bar last night, but he's definitely a plastic cup friend.
#throw away friend #best friend #friend #homie #acquaintance
by tocathe1 May 24, 2014
5 Words related to plastic cup friend
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