I've handled these kind of people before... They are hard to get off your shoulder but trust me it'll work ;) -I would pick a fight but not seriously fighting just arguing. And by that I mean to tell them off. - If that does not work then leave them out of everything you do. Don't go all loner but just leave that specific person or people out of your business. - Laugh it off. This almost always works but in most cases if you laugh it off like in a fake way that's realistic then...they'll see right through you.