A discussion about something totally pointless and inane that got out of hand and now consists of people fighting over nothing.
Basically like a flamewar, just that the discussion itself, as well as the participants, are so utterly stupid that it's impossible to put into words. Shitstorms like these always tend to be really easy to start, even when you don't want it - just like an avalanche, one false step (or word) can be enough to set free a shitstorm of epic proportions. One easy example for this is the ongoing console-fanyboy war.
Guy1: Well, I really don't like the PS3 so much ..
Guy2: WHAT? YOU DONT LIKE IT? BUT ITS THE BEST CONSOLE IN THE WORLD
Guy3: YEAH IT IS SHUT UP YOU GAY FAGGOT
Guy1: But I just like the 360 better, leave me alone!
Guy4: WHAT? THE 360 IS FOR FAGGOTS, ILL KILL YOU
Guy1: But it's just a conso...
Guy5: YOUR MOM SUCKS DICKS
Guy1: Oh man, what a shitstorm I've started here..