Abu energy means: The particular vibe of a football fan or match-going crowd who, regardless of their club, are united in their desire to see Manchester United defeated. Characterized by loud enthusiasm for opponents'. There is no real cause for parental concern; it is descriptive vocabulary rather than risky behaviour. It is sporting vocabulary and harmless in itself. 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.