Grunt work
/ɡɹʌ̃nʔwɝk/
"Grunt work" in a Sentence (2 examples)
He plans to hire somebody to do the grunt work of digging the trenches for the pipes.
She has not only participated in the left as a star, even though she came into the role quite young. When Holly was between entertainment jobs, she volunteered for grunt work in anti-war organizations.