be/get out of practice
US /biː/ɡɛt aʊt əv ˈpræk.tɪs/
UK /biː/ɡɛt aʊt əv ˈpræk.tɪs/

1.
감각을 잃다, 실력이 떨어지다
to be or become less good at doing something than you were, because you have not done it for a long time
:
•
I used to play the piano really well, but I'm a bit out of practice now.
예전에는 피아노를 정말 잘 쳤는데, 지금은 좀 감각을 잃었어.
•
After not driving for a year, I really got out of practice.
1년 동안 운전 안 했더니 정말 감각을 잃었어.