work your fingers to the bone

US /wɜrk yʊər ˈfɪŋɡərz tu ðə boʊn/
UK /wɜrk yʊər ˈfɪŋɡərz tu ðə boʊn/
"work your fingers to the bone" picture
1.

骨身を惜しまず働く, 懸命に働く

to work extremely hard, often to the point of exhaustion

:
She had to work her fingers to the bone to support her family.
彼女は家族を養うために骨身を惜しまず働かなければならなかった
He's been working his fingers to the bone on this project for months.
彼は何ヶ月もこのプロジェクトで骨身を惜しまず働いている