There's no rabbit in it — one popular theory traces the name to 'bania', an Indian merchant caste whose Durban eateries sold it.
A hollowed-out quarter, half, or full loaf of white bread filled with curry — traditionally mutton, chicken, or bean — and topped up to the brim. It's eaten with the fingers, tearing off chunks of the bread walls to scoop up the curry, usually with a side of carrot-and-chili sambal.