Run off at the mouth
verb phrase
To talk excessively or indiscreetly without thinking.
She has a habit of running off at the mouth when she's nervous.

Often appears as...
- habit of running off at the mouth
- constantly running off at the mouth
Usage tips
Disapproving
Colloquial
verb phrase
To talk excessively or indiscreetly without thinking.
She has a habit of running off at the mouth when she's nervous.

Often appears as...
- habit of running off at the mouth
- constantly running off at the mouth
Usage tips
Disapproving
Colloquial
Definition 1 of 1

Colloquial Use
Used in informal situations among friends or in relaxed settings, not suitable for formal contexts.

At the reunion, Mark started running off at the mouth about his wild college days.
Negative Connotation
Often implies disapproval; suggests a person talks too much or says inappropriate things.

Our coach was frustrated with the team for running off at the mouth instead of focusing.
Emotional Trigger
Can indicate someone is under stress, excited, or nervous, which leads to excessive talking.

During the interview, I was so anxious I started to run off at the mouth about irrelevant topics.
Colloquial Use
Used in informal situations among friends or in relaxed settings, not suitable for formal contexts.

At the reunion, Mark started running off at the mouth about his wild college days.
Negative Connotation
Often implies disapproval; suggests a person talks too much or says inappropriate things.

Our coach was frustrated with the team for running off at the mouth instead of focusing.
Emotional Trigger
Can indicate someone is under stress, excited, or nervous, which leads to excessive talking.

During the interview, I was so anxious I started to run off at the mouth about irrelevant topics.
Colloquial Use
Used in informal situations among friends or in relaxed settings, not suitable for formal contexts.

At the reunion, Mark started running off at the mouth about his wild college days.
Negative Connotation
Often implies disapproval; suggests a person talks too much or says inappropriate things.

Our coach was frustrated with the team for running off at the mouth instead of focusing.
Emotional Trigger
Can indicate someone is under stress, excited, or nervous, which leads to excessive talking.

During the interview, I was so anxious I started to run off at the mouth about irrelevant topics.
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