What it means
Means the tedious, repetitive graft that keeps everything moving while someone else gets the applause. Think admin, filing, cleaning up, hauling kit, chasing people for replies. If you're on donkey work, you're doing the heavy lifting and the boring bits, usually with zero credit. It’s the job behind the job, and someone’s always stuck with it.
Usage examples
"They’re pitching the flashy idea upstairs, and I’m doing the donkey work downstairs, sorting invoices and chasing signatures while everyone else nips out for tea."
"The interns did all the donkey work, sorting thousands of files, while the manager just signed off the results."
"Designing the logo is the fun part, but the donkey work is resizing it for forty different formats."
"Yeah, the presentation looks sexy now, but I did all the donkey work sorting the data and fixing everybody else's mess first."
"We can all clap for the launch if you want, but someone had to do the donkey work and get the stock counted, packed, and out the door."
Where it comes from
It’s old British English and pretty literal. The phrase grew out of the idea of a donkey as the beast stuck carrying loads and plodding through the rough, thankless labour. By the late 19th century, people were using donkey work for the boring, heavy, back-end tasks that keep things running without getting much glory.
