burn the candle at both ends
verb
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To work hard night and day.
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To waste something in two directions at once.
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To sleep late and wake up early; not well-rested.
sweat blood
verb
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To work very hard.
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To be extremely anxious.
How often have the words burn the candle at both ends and sweat blood occurred in a corpus of books? (source: Google Ngram Viewer )