嘴欠

zuǐqiàn
  1. (coll.) unable to control one's tongue
  2. prone to say sth nasty

CEDICT

colloquial

Entry Composition

1 嘴 zuǐ
  1. mouth
  2. beak
  3. nozzle
  4. spout (of teapot etc)

classifiers: 張, 個
2 欠 qiàn
  1. to owe
  2. to lack
  3. (literary) to be deficient in
  4. (bound form) yawn
  5. to raise slightly (a part of one's body)