mouth breather
A person who is boorish, stupid, or otherwise unattractive.
Meaning adapted from Wiktionary, available under CC BY-SA 4.0.
“Don't listen to that mouth breather.”
“I cannot believe I have to work with such a mouth breather on this important project.”
“The manager dismissed the critic as a mere mouth breather, ignoring the valid points raised in his review.”
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all mouth and no trousers
Alternative form of all mouth and trousers.
- 02
all mouth and trousers
Superficial, engaging in empty, boastful talk, but not of real substance.
- 03
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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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).
- 08
down in the mouth
Sad or discouraged, especially as indicated by one's facial appearance.
Last updated August 10, 2026