如簧之舌

rúhuángzhīshé
  1. lit. a tongue like a reed (idiom)
  2. fig. a glib tongue

CEDICT

形容人講話滔滔不絕。

重編國語辭典

Entry Composition

1 如 rú
  1. as
  2. as if
  3. such as
2 簧 huáng
  1. reed (of a music instrument)
  2. spring; coil
3 之 zhī
  1. (possessive particle, literary equivalent of 的 de)
  2. him
  3. her
  4. it
4 舌 shé tongue