minddumping 

A description of speaking the contents of your head without really thinking about any of it.

She had a serious minddumping habit going on, one that her husband was the unlucky beneficiary of, almost every day after working at the prison.

minddumping by Dr Bunnygirl June 17, 2020

mindnumbing 

Adjective
Could be used about pain
When it just hurts so much you basically feel numb and can't think at all
Vision might get blurry too..

A burning, mindnumbing pain shoots through my chest and I fall to my knees. I can feel my heart pumping blood, but all it does is flow through the hole through my lung.

mindnumbing by shittywriter June 4, 2018