"action szn" means: A designated stretch of time — real or declared — when the vibe shifts from planning to moving. Action szn is less about a calendar date and.... 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.