Top Definition
1- Someone that pretends they dont know their friends anymore when they get around "more important" people. The Big Leaguer is a cool guy when no one else is around, but when its time to roll to the big city, you are no longer important or significant what so ever. The big leaguer will shit right on you on not even notice he is doing it.
We went to NY and it was all good until Scott Stephens started big leaguing us at the ESPN zone and then at his creepy loser friend's apartment. Man, i thought that guy had our backs but all he is is a Big Leaguer!
by BigTito April 29, 2008

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