the.com/workhorse

The reliable one nobody thanks until it breaks down.

means A person or thing valued for steady, uncomplaining reliability in doing large amounts of necessary work.

from A straightforward 18th-century compound of 'work' plus 'horse' — literally a horse bred and kept for heavy farm or hauling labor, as opposed to a showier riding or racing horse. By the 1800s the word had trotted into figurative use for any dependable, tireless worker, human or machine, that gets the unglamorous jobs done.

origin
literally a farm horse bred for labor, not looks
not a racehorse
built for endurance, not glory
office version
the colleague who never gets credit, only tasks
irony
the most essential one is the least celebrated
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