What is Murder Death Kill?
1.
Murder Death Kill was a term coined in the 1993 action film Demolition Man. The term was used to describe a homicide. The film was set in an age where homicide was a very unusual thing, which is presumably why the term iterates the fact repeatedly.
Taken from the Demolition Man film:
"We can just wait for another code to go red. And when Phoenix performs another Murder Death Kill, we'll know exactly where to pounce."
See
2.
From the movie demolition man. Said in context of something being particularly bad for you.
Try this bacon lard cheese dip, it's murder death kill.