Oh, that's just what I call the idea; I don't think it really has an official title. I suppose you don't know the Muggle fairy story by that name, do you? I read it in a book on the shelves at the Burrow when I was being home-schooled by Mrs Weasley.

Anyway, in that story a young princess is cursed so that she falls into an enchanted spell for a hundred years. To protect her, the witch who is her godmother causes a huge wall of thick briars and brambles to spring up all around the castle where she sleeps, so dense that no one can cut their way through. I suppose you could think of it as a Herbology-based shield spell.