He runs at the mouth and never lets anyone else speak.
run at the mouth
idiomTo speak ceaselessly or without end.
I tried to focus on the movie, but the person behind me kept running at the mouth the entire time.
The politician ran at the mouth for hours, offering endless excuses while failing to address the actual concerns of the voters.
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all mouth and no trousers
Alternative form of all mouth and trousers.
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all mouth and trousers
Superficial, engaging in empty, boastful talk, but not of real substance.
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all one's taste is in one's mouth
One lacks good taste in aesthetic or cultural matters.
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bad taste in one's mouth
A feeling that something is morally despicable as to cause nausea.
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big mouth
The mouth of someone who talks too much, especially by making exaggerated claims or by inappropriately revealing information.
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born with a silver spoon in one's mouth
Born rich, or into a wealthy family.
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break into a run
To start running.
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butter wouldn't melt in someone's mouth
The identified person appears to be benign, mild-mannered, or calm (but with an integral suggestion that, to the contrary, they really are untrustworthy, disagreeable, or mean-spirited).
Last updated April 17, 2026