Adpocalypse arc means: The full narrative trajectory of a YouTube adpocalypse event - from the inciting controversy or advertiser revolt, through the creator panic and platform response, to the eventual recovery or new. 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.