"yaar energy" means: The warm, loyal, genuinely-invested aura that a person or even a place gives off — that unmistakable feeling that you are safe here, that so.... 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.