Or it could mean your leaving your computer on and not at the keyboard. afk a sec, afk, insted of gtg or brb - afk is a alternative a short term version. This Slang page is designed to explain what the meaning of AFK is. The slang word / phrase / acronym AFK means . Online Slang Dictionary. AFK is commonly used with a descriptor like " afk bio" (you are going to the washroom), or " afk phone" (you are answering a phone call). AFK is. And Now For A Word From Our Sponsor. If the messaging is in a professional context with someone at work, or with a customer or vendor outside your company, then avoid abbreviations altogether. Used in mobile texting and instant messaging as. Published July 18, Mobile Apps Apple Android Kindle Windows Windows Phone. Hope To Hear From You Soon. AFK is an acronym for Away From Keyboard.