decapamemberment 

The act of both cutting the head off of someone and cutting their limbs off someone in one quick motion or used over time. Frequently said when talking about acts in video games such as a grenade kill.
Also known as gibbing.

GUY 1: I was playing left 4 dead 2 last night.
Guy 2: How did it go?
GUY 1: After I got the grenade launcher all I got were decapamemberments

decapamemberment by hail2theking June 16, 2010