Do not put the bad mouth on your coworkers.
put the bad mouth on
idiomTo speak ill of; to vilify.
Origin
disputed originCompare badmouth.
He always puts the bad mouth on his former boss whenever he talks to new colleagues.
Despite her professional success, she felt hurt that her rival continued to put the bad mouth on her reputation behind her back.
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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 actor
An individual or entity with a prior criminal conviction, or who has been sanctioned by the court or regulator.
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bad apple
A person who is not wholesome, honest, or trustworthy, especially one who has an adverse influence on others.
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bad books
Disfavor.
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bad business
Synonym of bad news (“irritating, troublesome or harmful thing, situation or person”).
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bad company
The wrong crowd.
Last updated April 17, 2026