Someone who aims to kill off popular snob's reputation.
They can use force, rumors, or just beating the living shit out of them.
They usually aim for the dicky guys and girls who wear Abercrombie & Bitch, Hollisnerd, or Aeropasta.
popular: OMG! a Popular Killer! Shit me better run but not to fast or our clothes and hair will get messed up!
Popular Killer: Die shiity ass munching fuck of a popular kid! *Drop kicks*