After this type of break up there is never a chance of getting back together only a slight chance of future hate sex. You will always despise your ex after this.
Girlfriend: "I never want to see you again either douche bag, I'm getting laid tonight by another guy don't you worry!!"
Boyfriend: "Been there done that... I'll be smashing two skanks by midnight, peace out!"
Girlfriend: "You sucked in bed anyways and best of luck with your twizzler dick"
Mutual Friend of Both: "Damn did you hear what happen to them... total grenade break up"