Blowing Smoke : Phrases
To be boasting without being able to back it up, talking about action without intent to follow through.
Do you really want to buy this car or are you just blowing smoke?
Magicians often use smoke in their performance to obscure your view and conceal a bit of trickery. A person who is blowing smoke is tricking you and attempting to cover it up.
See also : Smoke and Mirrors
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