“Mouth” as slang means “to talk too much, especially when you shouldn’t.” When someone says “Don’t mouth off,” they’re telling you to stop speaking rudely or revealing things that should stay quiet.
People use it in everyday life like this: if a kid keeps answering back to a teacher, a friend might whisper, “Stop mouthing off.” Or if someone brags about secret plans, you’ll hear, “He’s got a big mouth—he’ll mouth everything to the press.” It’s quick and clear; you’re warning someone to zip it.
Meaning & Usage Examples
• “Don’t mouth to the cops.” = Don’t talk to the police.
• “She mouthed about the surprise party.” = She spilled the secret.
• “Quit mouthing and listen.” = Stop talking rudely and pay attention.
Context / Common Use
You’ll hear it most in casual chats, school hallways, or movies when someone is being sassy or leaking gossip. It’s not formal—save it for friends or social media captions like “Can’t believe he mouthed the ending.”
Is “mouth” always rude?
No. It can be playful among friends, but it usually hints the speaker should quiet down.
Can I use “mouth” in writing?
Yes, in dialogue or tweets, but skip it in work emails—stick to “speak” or “talk” there.
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