gift of the gab

noun1

1. •
   The ability to talk readily, glibly, and convincingly, especially on trivial matters and small talk.

   • "Ay, that he shall," replied Fagin, "and we'll have a big-wig, Charley: one that's got the greatest gift of the gab: to carry on his defence; and he shall make a speech for himself too, if he likes." — 1839