When you tag two people in your facebook status, and put "versus" or "vs" in between the two names. By doing so you're implying that the two should argue on your facebook status.
Bob: @John VS @Jane. Facebook battle. GO!
John:BITCH, I'LL FUCK YO SHIT UP!
Jane: I'LL CUT YO DICK OFF!
An arguement that occurs on Facebook through a status that has nothing to do with the Status, usually resulting in the continued use of a Status for several days leading up to four hundred emails of the amount of one to three word comments on the status.
Bob's Status: Works so Boring!
Jim: Your telling me.
Bob: Jim you dont even have a job!
Jim: I'm just saying
Bob: WTF you always do this, every friggen status!
Jim: So how about those Yankees?
Bob: OMG Don't even get me started!
Jim: This is reallly starting to feel like a Facebook Battle..
Bob: You friggen started it, geez get a life!