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1.
Modeled after AFK (Away From Keyboard).

Adding "N" for Network, since modern touch devices don't have a physical keyboard (their main feature is being connected to the internet). And we all live in the cloud. Sometimes with keyboards. Sometimes not. Hence, AFKN.
I am going on AFKN vacation next week! (sounds great too).
by @froginthevalley January 04, 2012