"rag the puck" means: To retain possession of the puck by skillful skating and stickhandling without attempting to score, as a deliberate tactic intended to use u.... 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.