We have some phrases that sound a little painful, like this one: I am going to bite my tongue. This does not sound good, like it might hurt. Let's listen again.
bite my tongue 守口如瓶
A: I couldn't believe that happened!
B: I know. Are you going to say something?
A: No, I am going to bite my tongue.
B: I can't believe you are not going to say something!
In American English, if I say that I'm going to bite my tongue, it means that I won't talk about something. I am going to keep quiet.
This is an informal phrase, not one for business. I am going to bite my tongue.
