a silver/smooth tongue

silver tongue

Oratory skills that are particularly eloquent, artful, seductive, and/or persuasive. He might not have much experience in politics, but his silver tongue is bound to win over a great deal of voters.

See also: silver, tongue

a ˌsilver/ˌsmooth ˈtongue

the ability to talk in a very pleasing and polite way, to make people do what you want: It was his silver tongue that got him the job. ▶ ˌsilver-ˈtongued, ˌsmooth-ˈtongued adj.: smooth-tongued salesmen

See also: silver, smooth, tongue