not open (one's) mouth

(redirected from not open his 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 ?
When Dorothy presently asked him a question the Tin Woodman could not open his mouth, for his jaws were tightly rusted together.
Fix, as he bowed, had a stifled feeling, and, going forward, where he ensconced himself, did not open his mouth for the rest of the day.
Yet he durst not open his mouth, and drove in silence till they had passed the main park-gates and turned into the cross-cut lane along the wall.
He could not open his mouth properly and weakness in his shoulder and left arm, revealed Mr Russell.
But much like in days long gone when the Voice of Kenya was the only TV station and the politician could not open his mouth until the 'big camera' was in sight, we now see a DCI and DPP keen on doing everything under the watchful eye of the television camera.
Amaechi should not open his mouth again and say Wike is using me.
What was best about him was that he would not open his mouth if he did not have the facts.
He appears, in Isaiah's description, "like a lamb led to slaughter or a sheep silent before shearers, he did not open his mouth" (Is 53:7).
Then she realised her 10-year-old pet could not open his mouth.
He was so weak he could not open his mouth or stand up and when he was taken back to a local house he refused all food and water offered to him.
Here the under-investigation Harris, who did not open his mouth until an hour and 15 minutes into proceedings, took the "his mistake is not my mistake" approach to their scapegoating of Nason, who was not here but can rarely have been discussed in such detail.
He would not open his mouth in a police interview, then pretended to be sick into a bin.
Going one step further, Webb said that being Scottish, Ferguson is lazy and as a result, does not open his mouth completely while speaking.
But I could not open his mouth, so I took the axe and hit him on his head," Maksudova said.