What does the idiom blowing smoke mean?

The idiom "blowing smoke" means to deceive or mislead someone with empty promises or insincere talk. It implies that the person is talking a big game but isn't actually doing anything substantial or meaningful.

Here are some examples of how the idiom might be used:

* "The politician was just blowing smoke when he promised to fix the economy. He has no real plan."

* "Don't believe everything you hear, that company is just blowing smoke to get you to invest."

The image of "blowing smoke" comes from the idea of creating an illusion or distraction, like the smoke from a campfire might obscure what's really happening behind it.

The idiom can be used in a variety of contexts, but it is often used to describe someone who is being dishonest or trying to pull the wool over someone's eyes.