脱皮掉肉[ tuō pí diào ròu ]

⒈ 喻指卖命(老头子一辈为小梁庄群众起早搭黑，脱皮掉肉奔波，哪天黑来不熬到鸡儿叫)。——崔巍等《爱与恨》英work with all one's might;