What does “talk my book” mean? I don’t have a book Edit: Apparently a financial term to mean “talk up your stock” which…if you don’t think that’s a good metri

What does “talk my book” mean? I don’t have a book Edit: Apparently a financial term to mean “talk up your stock” which…if you don’t think that’s a good metric then why would you consider it talking my book lol cmon mayne