Slowly back away and never show her your back. You'll find yourself doing a lot of this with your future girlfriends and wives.
Have you tried pinching her nipples? I'm told that works well.
Tell the girl why you're irritated with her, hopefully she fixes what's irritating you
Count to ten and then go take a long walk.
I just tell them to be quiet.
Sometimes women will excuse what a guy does by reminding themselves he's just a man. Sometimes you need to remind yourself she's just a girl.