Action check means: A quick audit of whether someone is actually putting in effort or just talking. An action check cuts through all the plans, promises, and big energy to ask the real question: what have you actually. It has drug-related associations; worth a calm conversation about which side of the topic your teen is on. 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.