Simple as in blurt To speak incessantly or incoherently, often revealing excessive or irrelevant information; similar to gibbering. Clear All
2 Example Sentences Showcasing the Meaning of 'Run Off At The Mouth'
Timmy tends to run off at the mouth in class, sharing every detail of his weekend adventures.
The little boy would run off at the mouth, narrating his adventurous dreams to his parents every morning.
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