attacker

aggressor assailant assaulter

offender wrongdoer

ambusher avenger beast bludgeoner brute bully harasser harrier hooligan iconoclast lapidator marauder night rider nightrider piranha predator raper rapist retaliator roughneck rowdy ruffian savage shedder slasher spiller stabber stoner tough vulture wildcat wolf yob yobbo yobo