快嘴

kuàizuǐ
  1. unable to keep one's thoughts to oneself
  2. blabbermouth

classifier: 張

CEDICT

Entry Composition

1 快 kuài
  1. rapid
  2. quick
  3. speed
  4. rate
  5. soon
  6. almost
  7. to make haste
  8. clever
  9. sharp (of knives or wits)
  10. forthright
  11. plainspoken
  12. gratified
  13. pleased
  14. pleasant
2 嘴 zuǐ
  1. mouth
  2. beak
  3. nozzle
  4. spout (of teapot etc)

classifiers: 張, 個