how many of these are actually two letter acronyms?
A couple of them, by the looks of it. OP, CC, WG (water gate), etc.
PVD = Player vs. Door, a.k.a. IoJ'ing the door: to attack an objective's gate with personal DPS (damage per second) rather than building and/or using siege. It is also called IoJ'ing the door due to that server's (Isle of Janthir) apparent dislike of siege use.
PVW = Player vs. Wall, a fortunately rare phenomenon wherein the player attacks the breakable wall instead of using siege. Since it doesn't do any damage, it's discouraged but funny to watch.
Everything else I can think of is more jargon (Hills, Bay, oj's (which I guess if you spell 'swords' with a j works), hammer down, cc, door cata/treb, etc.).