grunt work

noun

, Slang.

1. work that is repetitious, often physically exhausting, and boring.

Example Sentences

On another level, it’s about the gardens themselves—self-contained units that automate much of the grunt work of gardening and empower gardeners to grow their own produce year-round, regardless of the temperature outside.

From Quartz

Moving apps onto your new device isn’t difficult, but it does require a little grunt work.

From Popular-Science

Fortunately, the Food Sense App for the iPhone does the grunt work for you.

From The Daily Beast