work like a horse

• Audio (General Australian):

  (file)

work like a horse (third-person singular simple present works like a horse, present participle working like a horse, simple past and past participle worked like a horse)

1. (simile, idiomatic, informal) To work very hard; to toil.

• work like a dog
• work like a mule
• work like a nailer
• work like a Trojan

• workhorse
• piss like a racehorse, eat like a horse

• “work like a horse”, in OneLook Dictionary Search.
• work like a horse, work like a dog, work like a mule at the Google Books Ngram Viewer.