Agyen means: A Geordie dialect spelling/pronunciation of both 'again' and 'against,' reflecting the distinctive vowel sounds of the Tyneside accent. In Geordie, many standard English words are pronounced with a. 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.