salt mine

noun3

1. •
   Any mine used for the extraction of salt.
2. •
   Any laborious work situation, especially in a confined space.
3. •
   (Internet, disapproving) An abundance of indignation felt by one person or a group of people due to over-sensitivity, humourlessness, disappointment, or defeat; a gold mine of salt.

   • The fan forum was an absolute salt mine after the football team's loss to the last-place team in its division.