The idiom ‘blowing smoke’ refers to someone who is making exaggerated claims or attempting to deceive others. It usually suggests that the person is not being honest and is simply ‘blowing smoke’ to create a false impression or distract from the truth.
For example, if a salesperson is trying to convince you that their product is the best on the market without any substantial evidence, they might be said to be ‘blowing smoke.’ This idiom often conveys a sense of skepticism towards the person’s intentions or statements, implying that they are not grounded in reality.