a fast talker

fast talker

A person who verbally manipulates others into doing or believing something, especially something that is not in their best interest. I could tell that he was a fast talker just by the way he tried to close the deal so quickly. Used car salesmen have a reputation for being fast talkers. They'll say anything to sell a car.
See also: fast, talker
Farlex Dictionary of Idioms.

a fast ˈtalker

a person who can talk very quickly and easily, but who cannot always be trusted: The salesman was a real fast talker, and somehow managed to convince me to buy the most expensive model!
See also: fast, talker
Farlex Partner Idioms Dictionary
See also:
  • (I) wouldn't (do something) if I were you
  • a walking
  • a walking (something)
  • a/the feel of (something)
  • all righty
  • a horse of another
  • a horse of another color
  • a horse of another colour
  • a straw will show which way the wind blows
  • a crack at (someone or something)