Applied to someone who is present only when things are going well or when they need something, but at the first sign of trouble/hardship, they disappear faster than Brittney Spears's career

In sports, the term is often confused with a bandwagoner, but unlike bandwagon fans, a fair weather fan initially has some interest in the team, but they want nothing to do with them when tough times occur. As soon as the team starts to turn things around and starts winning, they act as if they been there through thick and thin.

A fair weather friend is more of an associate/acquaintance. They aren't truly your friend, but you talk to them enough to somewhat know them personally. They act nice to you when they need something, but as soon as you need them to return the favor, they are nowhere to be found. A true friend is there for you no matter what.

This term can be applied to anything in life, but these are the most common.

-Example of fair weather fan-
Me: The Lakers are on tonight, I can't wait
Fair Weather Fan: I can't wait either, they rock this year
Me: I thought you said acouple years back you were done watching them after ________ got traded and you couldn't stand all their mounting losses
Fair Weather Fan: Shh the games starting

-Example of Fair Weather Friend-
Fair Weather Friend: Hey I was absent last week, can I borrow your notes?
Me: Sure man, no prob
Fair Weather Friend: Cool man thanks. You wanna chill later on after your done with all your classes?
......Later on that day......
Fair Weather Friend: Thanks for letting me use your notes, i got a B on the test
Me: Its cool. So we still gonna hang out?
Fair Weather Friend: Huh, hang out? Nah man I can't, I got plans with other people
by .PiCe.NuSSy. January 21, 2009
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 21, 2007
Means weather the Steelers or any Pittsburgh team is having a bad game or season you still root no matter what. No fair weatherness. CRAZY ITAILIAN GUY 96.1 Kiss Mikey and Big Bob
I am not giving up on a the Steelers , no fair-weatherness here!
by Joe4055 July 24, 2014
a fake friend.
who will be a best friends, but be careful, because they will backstab you quicker than lightning.
mary elizabeth harpel is a fucking fair weather.
by victom1 March 30, 2009
A friend who only associates with you when they have nothing better to do. Someone who may only stick around in exciting situations but when times are somewhat boring, leave your side.
A fair weather friend would act like they want to hang out but never invite you to do anything and if you invite them to do something they will only do it if they cant find something better.
by carebear bob April 6, 2010
Someone who you thought was a good friend but they only show up when the circumstances are in their favor.
At first I thought Matt was a good friend because he would always hang out. Turns out he was just a fair weather-friend. Boy it is mighty cloudy today.
by dnicker October 1, 2014
A fan of a sports team who only shows support when the team is doing well. During hard times they usually bandwagon other teams. They basically have no real loyalty to the team, but still manage to get better seats than you at the game. Strangely they mysteriously vanish at the first sign of trouble.
Fair weather fan: "OMG what a comeback! That was amazing!"

Regular fan: "How would you know? You left right when Favre threw the pick six in the 2nd and if I recall you didn't even start rooting for Green Bay until 2 weeks ago."

Fair weather fan: "... GO PACK!"

(After the playoff game the fair weather fan immediately became a Pats fan and stowed all Packer memorabilia away.)

Fair Weather Fan's creed:
Last to join, first to leave.
by Rappathered January 25, 2008