Based maxxing means: The deliberate, sustained effort to become as fully and authentically oneself as possible - based-maxxing is the active pursuit of total unapologetic self-expression rather than waiting for it to. There is no real cause for parental concern; it is descriptive vocabulary rather than risky behaviour. If your teen uses it, context will usually make the intent clear. A short, curious question about where they heard it is usually all that is needed to know whether to follow up.