大吃一惊

大吃一驚
dàchīyījīng
(idiom) astounded; flabbergasted; taken aback

CEDICT

Entry Composition

1 大吃 dàchī
  1. to gorge oneself
  2. to pig out
2 一 yī
  1. one
  2. single
  3. a (article)
  4. as soon as
  5. entire; whole; all; throughout
  6. "one" radical in Chinese characters (Kangxi radical 1)
  7. also pr. yāo for greater clarity when spelling out numbers digit by digit
3 惊 jīng
  1. to startle
  2. to be frightened
  3. to be scared
  4. alarm