"afk check" means: An AFK check is a quick callout — in games, group chats, or Discord servers — used to verify whether someone is actually present or has quie.... This is a fairly neutral word with no inherent risk attached. There is no real cause for parental concern; it is descriptive vocabulary rather than something dangerous. If your child uses it, context will usually make the meaning clear. A brief, curious question about where they heard it is generally enough to know whether to follow up.