This article is silly. Coming from a source other than the computer games, trading card game, novels, RPG, or manga, its content is not part of official Warcraftlore, but nevertheless has become part of the culture belonging to the World of Warcraft community.
Nerdgasm in World of Warcraft is the state of euphoria players might feel after defeating a raid boss they have been wiping on for a long time. This often manifests itself in screaming and cheering over voice over IP software. It is sometimes heard at the end of boss kill videos posted on the internet.