fair weather fan

慣用表現

(sports, idiomatic) A fan who only pays attention to their favorite team when they are performing well.

日本語の意味

チームが好調な時だけ応援し、成績が悪くなると応援から離れるファン

He's a fair weather fan who only shows up when the team is winning.

彼はチームが勝っているときだけ姿を見せるにわかファンだ。

意味（1）

(sports, idiomatic) A fan who only pays attention to their favorite team when they are performing well.

fair weather fans

（ plural ）