be a loud mouth(redirected from are a loudmouth)
Like this video? Subscribe to our free daily email and get a new idiom video every day!
be a loud mouth
To have a tendency or habit of speaking incessantly, indiscreetly, and/or in a noisy, boastful manner. I can't stand Terry's new husband—he's such a loud mouth when he drinks! If I had known you were such a loud mouth, I'd have never shared my secret with you!