beast of burden

noun3

1. •
   A domestic animal that performs heavy work for humans, such as carrying a load (on its body) or pulling a load (which trails behind).
2. •
   Any domestic animal trained to perform other tasks for humans, such as a herding dog or trained falcon.
3. •
   (figurative) A person who is mistreated by being inappropriately treated like a servant.

   • Get it yourself. I'm not your beast of burden.