not open (one's) mouth

(redirected from not open my mouth)

not open (one's) mouth

To be completely silent; to remain discreet (about something); to not tell anyone (about something). All the while our teacher was shouting at us, we didn't open our mouths. Don't open your mouth about this! I would die of embarrassment if anyone were to find out.
See also: mouth, not, open

not open one's mouth

 and not utter a word
Fig. not to say anything at all; not to tell something (to anyone). Don't worry, I'll keep your secret. I won't even open my mouth. Have no fear. I won't utter a word.
See also: mouth, not, open

not open one's mouth

Also, shut one's mouth; not say or utter a word . Be silent, repress one's feelings or opinions, keep a secret. For example, Don't worry, I'm not going to open my mouth on this issue, or She promised not to say a word about it to anyone. Also see hold one's tongue; keep one's mouth shut.
See also: mouth, not, open

open your (big) ˈmouth

(informal) say something when you should not: Why do you always have to open your big mouth? Can’t you just keep quiet sometimes?
See also: mouth, open
References in classic literature ?
And now, ask me not a single word, as from this moment I will not open my mouth even to cry out.
And when the questions about my madam in Nigeria started, I did not open my mouth like Gina.
I amnot vocal; before Iwas made captain I would sit in the changing room, read the programme and not open my mouth once.
I had the shock of my life and I could not open my mouth as I, along with the other dignitaries, were being ushered in towards, probably, a dais or some such place.