I was going to rep you if you knew. I think it's some sort of biscuit-like thing.
Then there's the stuff in that spider nursery rhyme I was reading to my boy today. I don't know wtf a tuffet is (or whey, for that matter).
I lived in England for 8 months. It's like a spongey english muffin. They are good because they soak up more butter.