Definition of sweat blood in English:

sweat blood

informal
1Make an extraordinarily strenuous effort to do something: she’s sweated blood to support her family
1.1Be extremely anxious: we’ve been sweating blood over the question of what is right
See parent entry: sweat

Definition of sweat blood in:

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Word of the day flippant
Pronunciation: ˈflɪp(ə)nt
adjective
not showing a serious or respectful attitude