Most real time conversations I have is complete bullshit, so that's plenty of practice. The problem is that when chatting I don't have time to put any deep thought into my words, I just say whatever is heuristically true. The alternative is to constantly add disclaimers about how much I believe the words I am spouting which kills convo very quickly.

If you have smart friends who are willing to challenge your bullshit occasionally, your bullshitting skill should improve and converge into simply "good intuition". Which is a great skill to have when dealing with actual hard problems.