We were looking at some old photos of the area where DH used to live (Hereford/Welsh border) & DH referred to one being of 'the slang' - a small unoccupied bit of land between two gardens.
I've never heard of the term & DH doesn't know if it's a family word, a corruption of the name the land used to go under or a regional term - DH's mum was from Manchester & his Dad from West London, so it could have been either of those.
Anyone ever heard of it?