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"Smile guy" is used to describe a person that walks into an already started conversation between a group of people and then just stands and smiles. Usually, the person is not really great friends with anyone in the group, and after not talking for a while, begins to feel awkward. After hes not acknowledged for a while... he just walks away. Db.
Look at Schersh standing in that group lookin like a doofus! He must be a smile guy.
by DouglasFresh December 12, 2006
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