keep your mouth shut
成語所屬單字mouth
keep your mouth shut — 慣用語
1. To not say anything about a secret or something that could cause trouble.
1.慣用語
釋義
閉嘴；守口如瓶
To not say anything about a secret or something that could cause trouble.
例句
You should keep your mouth shut about the plan.
I told him to keep his mouth shut, but he talked.