This term is derived from the words Hipster and Terminator.
Hipster #2: "I'm too hip to care at the moment, Eleh's Radiant Intervals sounds too rad. Heard it yet?
Hipster #1: "Yeah man, I actually wasn't really in to it. Very Mediocre in my opinion. (Not only lying to earn credit with his friend because he's never actually heard of them but denying to like it to show how hip he is.) I hope the Hipsterminator isn't listening in on this conversation, we'll be dead for sure.
"Yeah, man. He's a real Hipsterminator!"