Say, you have to go for a break, then you write AFK in your private/public chatroom. Used in mobile texting and instant messaging as well. Example of text message use of AFK: (user 1): Joan? Are you there? (user 2): sorry was AFK talking to Chris. (user 1): np, I just wanted to get. Someone told me that AFK stands for Away From Keyboard, but I've seen it what does afk mean In such cases, AFK can also mean A Free Kill. In texting and chat and online multiplayer games, such as Roblox.