fair-weather supporter
nounUK /ˌfeə ˈweðə səˈpɔːtə/
US /ˌfer ˈweðər səˈpɔːrtər/
A fair-weather supporter is someone who only cheers for a team or person when they are doing well.
He stopped wearing his team's jersey once they started losing, so everyone called him a fair-weather supporter.
RELATED WORDS
OTHER MEANINGS
2. A person who is friendly to you only when things are going well and disappears when you need help.
She was a fair-weather supporter who vanished the moment I needed a real friend.
3. Someone who backs a cause or leader only while it is popular or successful.
The candidate's fair-weather supporters drifted away after the first bad poll.
4. A fan who follows a team only during winning seasons.
The stadium was full of fair-weather supporters during the championship run.