(someone) grunt(s) work

Translations
(кто-то) выполняет рутинную работу
He always grunts work that no one else wants to do.
Он всегда выполняет рутинную работу, которую никто другой не хочет делать.
Definitions
Tasks or jobs that are physically demanding, repetitive, or tedious, often considered menial and requiring little skill, typically assigned to someone of lower status or experience.