Have a big mouth
verb phrase
To speak without thinking or discretion, often sharing secrets or private information.
Be careful what you tell John, he has a big mouth and might spread your secrets.
Often appears as...
- can't keep a secret
- known to have a big mouth
Usage tips
Informal, Disapproving
Colloquial
verb phrase
To speak loudly or excessively, often in a boasting or attention-seeking way.
He always has a big mouth at parties, trying to make himself the center of attention.
Often appears as...
- always has a big mouth
- stop having a big mouth
Usage tips
Informal, Disapproving
Colloquial
verb phrase
To speak without thinking or discretion, often sharing secrets or private information.
Be careful what you tell John, he has a big mouth and might spread your secrets.
Often appears as...
- can't keep a secret
- known to have a big mouth
Usage tips
Informal, Disapproving
Colloquial
verb phrase
To speak loudly or excessively, often in a boasting or attention-seeking way.
He always has a big mouth at parties, trying to make himself the center of attention.
Often appears as...
- always has a big mouth
- stop having a big mouth
Usage tips
Informal, Disapproving
Colloquial
Definition 1 of 2
Pro Tip 1/3Trust Implications
Using 'have a big mouth' suggests someone may break your trust by talking carelessly.
I didn't invite Clara since she has a big mouth and would've spilled the surprise.
Pro Tip 2/3Confidential Matters
It's often used when discussing matters that should be kept confidential or private.
Don't discuss your salary around him; he's got a big mouth.
Pro Tip 3/3Informal Context
Considered informal; the phrase isn't used in professional or formal circumstances.
No one in the office talks to him about personal stuff because he has a big mouth.
Pro Tip 1/3Trust Implications
Using 'have a big mouth' suggests someone may break your trust by talking carelessly.
I didn't invite Clara since she has a big mouth and would've spilled the surprise.
Pro Tip 2/3Confidential Matters
It's often used when discussing matters that should be kept confidential or private.
Don't discuss your salary around him; he's got a big mouth.
Pro Tip 3/3Informal Context
Considered informal; the phrase isn't used in professional or formal circumstances.
No one in the office talks to him about personal stuff because he has a big mouth.
Pro Tip 1/3Trust Implications
Using 'have a big mouth' suggests someone may break your trust by talking carelessly.
I didn't invite Clara since she has a big mouth and would've spilled the surprise.
Pro Tip 2/3Confidential Matters
It's often used when discussing matters that should be kept confidential or private.
Don't discuss your salary around him; he's got a big mouth.
Pro Tip 3/3Informal Context
Considered informal; the phrase isn't used in professional or formal circumstances.
No one in the office talks to him about personal stuff because he has a big mouth.
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