故作深沉

gùzuòshēnchén
to play the profound thinker

CEDICT

Entry Composition

1 故作 gùzuò
  1. to pretend
  2. to feign
2 深沉 shēnchén
  1. deep
  2. profound
  3. (of a person) reserved
  4. undemonstrative
  5. (of a voice, sound etc) deep
  6. low-pitched