"adult check" means: An adult check is the internet's way of pausing and asking whether you're actually ready to handle something — whether that's a spicy conver.... 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.