In everyday slang, “mouth” can mean someone who talks a lot, talks loudly, or talks when they probably shouldn’t—especially when they’re bragging or arguing. If a person is called a “big mouth,” it means they spill secrets or never shut up.
Friends might say, “Don’t tell Jamie your news; he’s got a big mouth,” or coaches warn players, “Keep your mouth shut and focus.” Someone who keeps mouthing off during class will probably get sent to the office. It’s all about the way a person uses their words, not the body part itself.
Meaning & Usage Examples
• “Big mouth” – a person who reveals secrets or talks too much.
• “Mouth off” – to talk back rudely or argue.
• “Run your mouth” – to keep talking without thinking.
Context / Common Use
People drop these phrases in casual conversation, group chats, and sports fields. They’re light jabs, not formal insults, and are often used among friends or teammates.
Is “mouth” always negative?
Mostly, yes. It focuses on someone talking too much or saying the wrong thing. Context decides how harsh it feels.
Can I use it at work?
Better not. “Mouth” and its phrases are casual slang—keep them for friends or teammates.
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