Wiktionary
big mouths
n. (big mouth English)
Usage examples of "big mouths".
They swarmed in around both Dolph and Marrow, their big mouths gaping.
Most crooks are stupid and have big mouths and when they start talking there is usually someone around to listen.
They'll sit up and take notice and keep their big mouths shut when I make them see they ought to attend to their own manners instead of mine.
It was the sort of place you'd expect to hear a major indiscretion uttered, when they couldn't keep their big mouths shut.
They have big mouths and snatch and swallow whole anything they see when they are hungry.