Definition of open one's mouth in US English:

open one's mouth


  • Say something.

    ‘sorry, I'll never open my mouth about you again’
    • ‘You didn't even manage to get accurate information before you opened your mouth.’
    • ‘A middle-aged woman who had seen the killing of a bail bondsman by a drug gang leader, was so scared she could not open her mouth on the stand.’
    • ‘Next time you open your mouth to react to something, think twice.’
    • ‘I try to assume less before opening my mouth or offering information.’
    • ‘After spending a great deal of the 1990s making speeches on education, I took a vow never to open my mouth on the subject again, at least in public.’