Accy check means: An accy check is the nervous or triumphant act of verifying how your accumulator bet is progressing - usually mid-Saturday afternoon when the first few legs have landed and you're either mentally. 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.