It is a website with a lot of helpful game information for the mmorpg World of Warcraft (items, quests, recipes, spells, skills). Sometimes skilled players use it to tell noobs to stfu.

the ultimate World of Warcraft databank/reference, similar to Google. It is a search engine that is extremely helpful to players of WoW, finds NPCs, locations, drops, statistics, opinions, strategies, maps, locations, classes, races, etc. A tool critical to making lvl 60.