做牛做马

to work like a horse and toil like an ox; fig. to slave for sb

to tire oneself out through overwork; to work oneself to death

to bury oneself in work (idiom); to be engrossed in work; to make an all-out effort

lit. to shed skin, drop flesh; to work as hard as possible

lit. the service of a dog or a horse (idiom); fig. faithful service

lit. with calluses on hands and feet (idiom); fig. to work one's fingers to the bone