lay something on the line idiom
使…受到危害，使…处于危险中
to risk harm to something
I'd be laying my career/life on the line by giving you that information. 给你透露那个消息会毁了我的前途／要了我的命。
informal把…说清楚，明白无误地说出，明确说明
to say very clearly that something is the case
You're just going to have to lay it on the line and tell her that her work's not good enough. 你就得把这件事摆到台面上，明白无误地跟她讲她的工作没做好。