corpserape 

to murder an individual that enrages you, then defile their corpse as an act of retribution

Justin said, "Jamie, if you piss me off one more time, I swear to god I will corpserape you."

corpserape by Jack Jerkdown June 3, 2010

corpserapist 

one who partakes in the activity of corpseraping

After Justin corpseraped Jamie, it was clear he had become a serial corpserapist.

corpserapist by Jack Jerkdown June 3, 2010