not open (one's) mouth

(redirected from don't open your 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 ?
Now, don't open your mouth too wide, because you don't look handsome when you do it.
He has to learn that you don't open your mouth when you get into situations because you end up sitting in the stand.
The last time we filmed down there Anthony Reynolds (former Jack frontman and indie singer-songwriter of some repute) took me out and Anthony said, 'We'll be all right as long as you don't open your mouth.
On issues that one is not very familiar with, if the old saying is paraphrased, keep your mouth shut and let the people assume that you are an ignorant idiot but don't open your mouth and erase that doubt.
Alex (to Stephanie): If you don't want to be spoken to in that manner don't open your mouth when I am speaking to somebody to make a valid point.
When confronting a colleague who's not pulling his or her own weight, don't open your mouth until you've opened your mind.
Here in Cairo," wrote Tarek Atia of Al-Ahram, Egypt's largest English-language newspaper, "if you don't agree with [population control guru Thomas] Malthus, just don't open your mouth.
Think about your answers - don't open your mouth and say the first thing that comes out
There is a time to laugh - just don't open your mouth too widely in the process.
Take your time and think about your answers - don't open your mouth and say the first thing that comes out.
Don't open your mouth until a goose has flown in (Icelandic).