open (one's) mouth

(redirected from open our mouth)

open (one's) mouth

To say something, especially that which is indiscreet, boorish, or meant to be a secret. Why did you have to open your mouth about my crush on Tommy? Why couldn't you just keep it between us? You've got to make sure that he never opens his mouth about what went on here today.
See also: mouth, open
References in periodicals archive ?
She began training at age 9 in classical ballet in Georgia: "I went to a musical arts high school, and coming from ballet, where we didn't open our mouths, it was great to learn that dancers can speak, act, and sing," she says.
And will we soon be afraid to open our mouths at all in case there's a new taboo?
WE OFTEN speak about having a frog in our throat or of someone who speaks with a plum in their mouth or that every time we open our mouths we put our foot in it.
The compulsion to open our mouths and gab sometimes gets a bad rap.