fair-weather loyalty

noun
UK /ˌfeə ˈweðə ˈlɔɪəlti/
US /ˌfer ˈweðər ˈlɔɪəlti/

Being a friend only when things are easy and fun.

His fair-weather loyalty showed when he stopped calling after I got sick.


OTHER MEANINGS

2. Support that lasts only while someone is successful or useful.

The team's fair-weather loyalty faded after three losses in a row.

3. A pretend kind of faithfulness that disappears when trouble comes.

Fair-weather loyalty is easy to spot when a storm hits.

4. Sticking with someone only for the good times, not the hard ones.

Real friendship is the opposite of fair-weather loyalty.