1 definition by sirithx

Top Definition
A fan that only supports their team when it is winning, or only likes a team because it is popular or successful. Apt to jump on and off the bandwagon as their team has it's ups and downs. They ultimately often do not care too much for the team.
I hate seeing all those fair-weather Red Sox fans that came out of nowhere after the 2004 world series.
by sirithx October 20, 2007
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Buy a fair-weather mug!