A. Someone who does the deeds of Jenova of the church of the one winged angel, a group of geeks who are obsessed with a video game.
B. This one I made up myself. Someone who's Played FF7 to the point that you fight either the first Jenova, or the Final.
Jesse: Huh? What the **** does that mean?
Jim: I don't know, but I find it funny.