all mouth and no trousers
Alternative form of all mouth and trousers.
Meaning adapted from Wiktionary, available under CC BY-SA 4.0.
“He talks big, but he is all mouth and no trousers.”
“Do not worry about his threats to quit; he is all mouth and no trousers.”
“My neighbor keeps bragging about his plans to build a luxury swimming pool, but I think he is all mouth and no trousers because he has no money.”
“Despite his grandiose promises of reform, the politician proved to be all mouth and no trousers when it came time to act.”
The phrase appears to be a corruption of the earlier all mouth and trousers, an idiom that relies on the same logic as all bark and no bite or the American all hat and no cattle. It is a construction designed to highlight the discrepancy between a person's verbal output and their functional capability.
The etymology rests on the juxtaposition of the mouth, which produces the boast, and the trousers, which are presumed to contain the necessary equipment for action. To be all mouth and no trousers is to be an individual whose presence is entirely phonetic. The term suggests a person who is a laughing stock, having provided the theatrical introduction to a performance that never actually arrives.
- 01
all mouth and trousers
Superficial, engaging in empty, boastful talk, but not of real substance.
- 02
all one's taste is in one's mouth
One lacks good taste in aesthetic or cultural matters.
- 03
bad taste in one's mouth
A feeling that something is morally despicable as to cause nausea.
- 04
big mouth
The mouth of someone who talks too much, especially by making exaggerated claims or by inappropriately revealing information.
- 05
born with a silver spoon in one's mouth
Born rich, or into a wealthy family.
- 06
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).
- 07
down in the mouth
Sad or discouraged, especially as indicated by one's facial appearance.
- 08
hold one's mouth right
To act in the correct way, and have a little luck.
Last updated August 10, 2026