A term used in the MMORPG World of Warcraft for a group of players that play Orcs, Undeads, Trolls and Taurens. these people are the counterparts to the Alliance in the game. While the alliance population is mostly made up by people who are around 12-14 year olds that usually are gankers, whiners, noobs, ninjas and perverts, the horde consists more of people of age 16 and up. The horde players are more well-behaving, friendlier and cooler than the alliance. Still, they are a minority compared to the alliance for strange reasons, but in PvP, it doesn't matter because horde still has an increased 20% chance of winning in the battlegrounds.
And the horde wins again!