Mass murder metal is black metal music that talks about all kinds of murderous and criminal acts against people, animals, organizations, nature, etc. It is a movement that seems to derive its themes from past famous tyrants and notorious serial killers. Bloodline is an example of a mass murder metal band.
Example Usage of murder
cathwilm: @emmelinelucy yh saw 2+lizzy dsnt hav a clue-it was SHIT! pure spectacle-bad story+bad songs!i wasnt gna kidnap her she was gna murder me!
Bryannnne: Jessica and I just committed a murder...we ran over a squirrel. Woops!
TrapStarzCliqq: Of Course It'll Be Yur Cash then I'll murder That Bitch and Send Her Body Bacc To Yo Ass. [Wayne Got bars]