The phrase "blew hot air" refers to someone who talks a lot without saying anything important or truthful. Antonyms for this phrase would include "spoke honestly," "delivered facts," "communicated clearly," or "provided information." These terms suggest someone who is communicating with sincerity and clarity, rather than simply making empty promises or boasting without any evidence to back up their claims. It is important to recognize when someone is blowing hot air, and to seek out sources of information and conversation that are based on honesty and integrity. By doing so, we can better navigate the complexities of our world and make informed decisions about the issues that matter most to us.