Reverse Boner
When you see something so tragic that you get the opposite of a boner.
Boner: Hot girl has a wardrobe malfunction.

Reverse boner: You catch an old fat guy in your bed masturbating while he eats a fish a jelly sandwich and laughs at you because he hacked your Xbox profile and is ruining your great Call of Duty record. And he killed your newborn and sick kitten with the bone from the chicken that you were going to eat for lunch and is using the fur as a fake mustache.