This Australian term for a woman’s breast appeared in the early 1960s. The popular etymology concerning its origin was supplied by Sidney Baker in The Australian Language(1966), when he associated it with the NSW butter manufacturer, the Norco Co-operative—at one stage a cow’s udder was featured on the wrapping of the butter. This has never been a convincing story, and we marked our entry in The Australian National Dictionary‘of uncertain origin’. We received a letter from Fred Parkes who offers a different explanation: