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.
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.
And that's English in a Minute.