I was told, many years ago, by friends in Grimsby and Cleethorpes, that a ‘Meggie’ is a person born in Cleethorpes - ‘Meg’s Island’ being an old name (possibly nickname) for Cleethorpes. And back in the ‘60s and ‘70s there was a folk-group from the area called ‘The Meggies’, later to become ‘The Broadside’. Well-known members were John Connolly and the wonderful Brian Dawson.