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1.
A fielders is a certain type of person that is immune to having a good time and generally just stands around awkwardly with his hands in his pockets during social events and situations. The term derives from baseball outfielders, who, for the most part, just fucking stand there.
Party Goer 1: Hey man, who's that guy sitting on the stool in the corner all alone?

Party Goer 2: Oh, that just John's friend from work. Huge fuckin' fielder, bud.
by DonQDick July 22, 2009