Horde Verse Alliance (also see AvH). A type of server used in the game World of Warcraft (also means PvP). HvA servers are harder then normal servers; there is more PvP activity.
BoB: I think when WoW comes out I'll play on the normal servers.
1337d00d: Only ghey n00bs play on the normals, kk? Grow some balls and use the HvA server!