廢寢忘食

fèiqǐnwàngshí

forget to eat and sleep

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fei4 qin3 wang4 shi2

to neglect sleep and forget about food (idiom), to skip one's sleep and meals, to be completely wrapped up in one's work

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廢寢忘食|废寝忘食 [fèi qǐn wàng shí] ► to neglect sleep and forget about food (idiom) ► to skip one's sleep and meals ► to be completely wrapped up in one's work