sweat blood

sweat blood

1. to work very hard. He says that writing does not come naturally to him and he sweats blood over every sentence. I sweat blood every week just to earn enough money to feed my family.

(mainly American, informal)

2. to feel very worried or anxious. We sweated blood as we waited for the police to phone, not knowing if Charlie was alive or dead.

See also: blood, sweat

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sweat blood

to work very hard. Some students sweat blood over their dissertation, and others write it in a couple of months.

See also: blood, sweat