We know those "Jersey Shore" girls could fight, but we had no idea they could get so violent.

Jenni "JWoww" Farley's ex-boyfriend and manager says the reality star was in such a rage last year that she almost killed him.  He claims she put a kitchen knife through his entire arm, and he needed 37 stiches. Ouch!

Check out what caused the alleged stabbing and more in the video below!