Abnormie check means: A social self-audit or group callout used to gauge whether someone's behavior has drifted into full abnormie territory - either as a lighthearted reality check or a playful accusation between. 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.