For real, my girl Dazy is one of the meanest kitties I've ever come across.  Here is her story.

Dazy Mae is has had 14 solid years of meankitty existence.  She is beautiful and she uses it.  She is an expert at looking like the ultimate cat specimen to lure you to touch her and then she will launch herself at you, clamp down with her jaws on a hand so you only have one hand to defend yourself with, and then she will proceed to use her razor sharp claws to slash as much skin as she can in the 2 or 3 minutes (or longer) it takes for you to pry her loose.

Another tactic is to launch herself at your head, attach herself by claws, and then bite at your face as long as she can.  She has attacked so many humans I can't remember 'em all.  We have a sign posted and always tell anyone who comes over just what they are dealing with.

Nor does she stop at humans.  She has attacked and ruined the attack/guard dog careers of several pitbull and rotweillers.  Even the horses learned to steer very clear of her.