This definition appears very rarely
and is found in the following Acronym Finder categories:
- Slang/chat, popular culture
Samples in periodicals archive:
I missed a 28-1 winner at Hexham and found that Bo Diddley died in my absence; he wrote Mama Keep Your Big Mouth Shut.
There was more to Bo Diddley than that - our band, called the Junco Partners after the title of a song by a Louisiana man, James Wayne - performed a great song of his called Mama, Keep Your Big Mouth Shut, which had a completely different riff, though it kept the same rumbling menace (in the originator's hands, at least).
I am old and ugly and I can deal with whatever you say about me, but when it comes to teenagers, might I advise you to keep your big mouth shut.