lay it on the line
US /leɪ ɪt ɑn ðə laɪn/
UK /leɪ ɪt ɑn ðə laɪn/

1.
开诚布公, 直言不讳
to speak frankly and directly about something, often something difficult or unpleasant
:
•
I had to lay it on the line to him about his poor performance.
我不得不开诚布公地告诉他他表现不佳。
•
The manager decided to lay it on the line to the team about the company's financial struggles.
经理决定开诚布公地告诉团队公司面临的财务困境。