"hadaway and shite" means: A full-force Geordie dismissal that pulls no punches. Hadaway and shite tells someone to not just go away, but to go away and talk nonsense.... 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.