pressure cooker

noun2

1. •
   A sealed cooking vessel that allows cooking in greater than atmospheric pressure and at a temperature above the boiling point of water.
2. •
   (figurative) A stressful situation that is liable to erupt.

   • Look, I had a pressure cooker of a job along with more responsibility that any one person should have. I had an office of twenty-five people under me all needing help like little birds in a nest. — 2006