I am stupid but, what is a dice fight?
She means a normal cyberfight but using dice to determine who is the dominant fighter in each couple of posts. So, as an example, let's say Kim and I are facing off, we each roll a d6. If she rolls higher than me, she posts first and, say, grabs my beautiful blond hair and pulls me in close so she can start getting a little nasty with my clothes. My post would be me reacting to that and probably trying to fend her off but failing to do so. Then we roll again, maybe I beat her that time and manage to do something equally nasty, like punch her in the belly a few times before trying to yank her ratty top off. It keeps going until one of us has one a die roll 10 or so times, however many she asks for.