throw someone in at the deep end
成語所屬單字deep
throw someone in at the deep end — 慣用語
1. to make someone start doing something new and difficult without giving them any
1.慣用語
釋義
讓某人直接面對最困難的情況；讓人硬著頭皮上
to make someone start doing something new and difficult without giving them any help or preparation
例句
The new teacher was thrown in at the deep end and had to manage a class of forty students on her first day.
Instead of training us first, the manager threw us in at the deep end with the biggest client account.