The term "AFK" stands for "Away From Keyboard." It is commonly used in online gaming and chat contexts to indicate that someone is temporarily unavailable or not actively participating in the conversation or activity because they are not physically at their computer or device.
The acronym "AFK" originates from early online gaming and chat environments in the late 20th century, where it became a shorthand way to communicate one’s absence to other players or participants without needing to type out a longer explanation.