"Grunt work" refers to tasks that are repetitive, mundane, and often require physical effort but don't require much skill or creativity. Full definition
Companies were willing to take on interns as a sort of community service as well as to get some of grunt work done for free. (inc.com)
Subsisting in poverty and reliant on Ray's many «girlfriends» to provide the rarity of a home - cooked meal, Charley takes a job at the Portland Downs doing grunt work for a low - level horse trainer named Del (Steve Buscemi). (theglobeandmail.com)
Sure, sometimes internships amount to little more than free grunt work for employers. (inc.com)