fast-talk (someone) out of (something)
1. To persuade someone to yield something or convince them not to do something by speaking in a fervent, facile, and (usually) manipulative or deceptive manner. Those salesmen are always trying to fast-talk people out of their hard-earned money.
2. To convince someone not to do something by speaking to them in such a manner. How were you able to fast-talk him out of signing all of his assets over to his wife?
fast-talk someone out of something
to use deceitful talk to get someone not to do something or to give something up. Don't try to fast-talk me out of my share.