A person who believes that anything goes, including murder, just so long as it isn't them who does the killing. Pacifists will snitch to police, set people up, steal, lie, cheat, screw your boyfriend/girlfriend, and instigate fights between non-pacifists. Pacifists tend to be very self-righteous types, smug, snooty, and elitist. They tend to live in a dream world that they can get away with this sort of crap forever and that nobody will wise up and crush them with a steamroller. They are wrong.
That stupid pacifist snitched me out to the cops. Now she's at the bottom of the lake with her pacifist feet cemented into a metal trash can.