A fork of Rural Dictionary
a plastic friend is someone who is your friend just for advantages and gives back only when he has to, not to get confused with a fake friend, which always is never really kind to you. These friends are usually friends with another one of your close friends that don't see how they're treating you.
Joe: have you seen Bill lately? Kate: yeah, he was hanging out with Luke and Drew Joe: Luke is such a plastic friend. Always taking and never giving! Kate: Bill talked to me about it, he doesn't like it, but he's afraid to lose Drew. Joe: he's also such a fake friend! Kate: IKR! he's a Plastic friend and fake friend.