"wirra" means: An Irish exclamation expressing dismay, grief, or lamentation — similar to 'oh dear' or 'alas.' It is typically used in expressions like 'wi.... 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.