slaughterfest

Extremely bloody combat in which many combatants are killed.

The trench warfare that had taken place during World War I sometimes were giant slaughterfests, with men sometimes running straight into machine-gun fire.

slaughterfest by Your Average Asian Dude December 29, 2015

Slaughterection 

An erection induced by committing or witnessing violence. See Murder Boner.

"Man, I've got a massive Slaughterection after that CoD match."

Slaughterection by Damiekinz♥ July 13, 2018