廢寢忘食

废寝忘食
fèiqǐnwàngshí
(idiom) to skip one's sleep and meals; to be completely wrapped up in one's work

CEDICT

Entry Composition

1 廢 fèi
  1. to abolish
  2. to abandon
  3. to abrogate
  4. to discard
  5. to depose
  6. to oust
  7. crippled
  8. abandoned
  9. waste
2 寢 qǐn
  1. (bound form) to lie down to sleep or rest
  2. (bound form) bedroom
  3. (bound form) imperial tomb
  4. (literary) to stop; to cease
3 忘 wàng
  1. to forget
  2. to overlook
  3. to neglect
4 食 shí
  1. to eat
  2. food
  3. animal feed
  4. eclipse