Absofuckinglutely maxxing means: Pushing absolute certainty and confidence to its logical extreme - operating with such complete, unshakeable conviction that every action is taken at maximum intensity. Used to describe someone who. 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.