I have heard my friend talk about being AFK on a Minecraft server, but AFK is an acronym for "away from keyboard". It's commonly used in. Looking for the definition of AFK? Find out what is the full meaning of AFK on bookofragametwist.win! 'Away From Keyboard' is one option -- get in to view more. This Slang page is designed to explain what the meaning of AFK is. The slang word / phrase / acronym AFK means . Online Slang Dictionary.