6eea6eed_ations___Guild_Wars_Wiki__GWW___Expansion
[Abbrev.] afk [Details] To indicate that player has stepped away from keyboard. When used as an emote (/afk) triggers the sitting animation. Sitting is an informal way to indicate that you're not around, but is only useful for players who can see you. A more useful action is to set your player status to "Away" in the Friends List window. [Expansion] 
Away From Keyboard
Abbreviations - Guild Wars Wiki (GWW)
Expansion