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1 definition by Milkman14

 
1.
To be a fan of a team only when that team is successful and to not associate with that team during unsuccessful periods.

Most often the term is used incorrectly to describe a fan who is extremely critical of their team during unsuccessful periods.
Wow, Bill really is a fairweather fan. He won't even talk about baseball now that the Tigers are losing.
by Milkman14 July 27, 2010