meatgrinder

noun

1. 1

   A device for cutting meat into very small pieces.

   “Keep your fingers away from the throat of the meatgrinder.”

2. 2

   A physically dangerous or wearing activity, as a military battle, or an occupational or athletic activity.

   “The mountainous second day of the race was a real meatgrinder, with 20% of racers dropping out.”

3. 3

   A process that is likely to be injurious in a non-physical way.

   “Senate confirmation hearings are a real meatgrinder, discouraging people from government service.”