go off the rails
成語所屬單字rail
go off the rails — 慣用語
1. To start behaving in an unacceptable or strange way, often due to problems.
1.慣用語
釋義
脫軌
To start behaving in an unacceptable or strange way, often due to problems.
例句
After losing his job, Brian went off the rails and started drinking heavily.
The project went off the rails when the main investor withdrew.