off your own bat
Meaning: If you do something off your own bat, you do it without being asked to or told to.
- I didn't tell the gardener to cut down the tree. He did it off his own bat.
- One of the actresses decided, off her own bat, to change her lines in the movie. The director wasn't happy.
Variety: This idiom is typically used in British English but may be used in other varieties of English too.
The production manager decided, off his own bat, to change the quality of the raw materials used in the factory. He did it