Don't trust his promise; the devil is a liar.
the devil is a liar
idiomA general expression of distrust, particularly implying that another person is attempting to deceive the speaker, or that a situation is not, or can not be, as it appears.
She told me the car was in perfect condition, but the engine died immediately; the devil is a liar.
When the politician insisted that the new tax would benefit the poor, the skeptical crowd muttered that the devil is a liar.
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dance with the devil
To engage in risky and immoral behavior.
- 02
devil dancing
Risky, reckless or potentially immoral behavior.
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devil in disguise
A person or thing that appears to be good, honest, or upstanding, but is inherently nasty, evil, or damaging.
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devil lies in the details
Synonym of devil is in the details.
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folk devil
A person or type of person blamed by the public for various ills, as during a moral panic.
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give the devil his due
To acknowledge the positive qualities of a person who is unpleasant or disliked.
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play the devil with
To cause great trouble or distress to.
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speak of the devil
An expression sometimes used when a person mentioned in the current conversation happens to arrive on the scene.