Academentiaer means: Someone who regularly exhibits academentia - a person whose thinking has become so steeped in academic jargon and institutional conditioning that they've lost practical perspective. Often used. 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.