Fair Weather Fan 1
1. term used to describe one who goes to/watches games he or she has absolutely no interest in nor hold any loyalty to any team playing. Characterized by forgetting what team/sport he or she is 'cheering' for. The fair weather fan swapped which team she cheered for during the game based on the team that was in the lead.
Related forms: Bored, Confused, Disinterested
See below for further illustration: