The act of masturbating so hard and so intensely that your penis falls off into a dark hole/vortex only to be later eaten by angry sexually frustrated unicorns.
"Last night I disasterbated, and it seems I will never be sexually pleased again. Cursed disasterbation !"
To cause a ridiculous number of tragedies and disasters to oneself including burning bridges, self mutilation, drug use, etc. with the climax usually being attempted suicide. Often happens at the pinnacle of depression or a bipolar low.
He's burned all his bridges, lost all his friends, and now he's addicted to heroin? Well now he's just disasterbating.
My life can't get any worse. I'm just going to disasterbate.