Someone who loathes posers and sees it as there mission to beat all the poser out of someone, so the poser can be themselves
Any poser reading this I'm gonna beat your ass
Two real acutal people (if there are any left) see a poser:
Person1-dude look at that poser
person1-(to poser)Hey don't make me go anti-poser on your ass!
poser-(confused)What? Oh...uh...GREEN DAY rocks!
person2-Go fuck yourself poser