off your own bat
成語所屬單字bat
off your own bat — 慣用語
1. Doing something because you want to, not because someone told you to.
1.慣用語
釋義
主動地；自發地
Doing something because you want to, not because someone told you to.
例句
After she finished her homework, Sayaka cleaned the kitchen off her own bat, which surprised her parents.
The students organized a charity sale off their own bat, without any help from the teachers.