It's a much more refined name for what we call the common gumboot here in New Zealand.
With Lucy playing soccer this winter season I decided to get a nice pair, and without much research I thought of Hunters. I knew Karen Walker stocked them but to my surprise they no longer do - because Hunter Gumboots are now made in China, egads! In their place they carry Barbour so I'm the very happy owner of a pink pair. They're lovely and slim-line which is flattering (and frankly quite necessary for gumboots) and I think they look nicer than the Hunters anyway. And they have a lovely plaid insole. Yes, that matters. And I could go all-out and get these to wear with them (though I could just make my own).
P.S. To the very left of my own photo above you can just make out Audrey's new cat shoes. She is utterly besotted with them.