闭嘴，住嘴
to not say anything
You'd better keep your gob shut about what happened. 你最好对所发生的事情什么也别说。
Jamie can't keep his gob shut - that's his problem.
I think I'll just keep my gob shut.
Amy needs to learn to keep her big gob shut.
I very quickly learned to keep my head down and my gob shut.
See also: gob noun