Today shampoo means washing your hair, but it once meant something entirely different. The Hindi word chāmpo is an imperative — "press, knead the muscles" — and in India's traditional bathing culture it referred to massaging the body and scalp with oils. In the 18th century, an Indian-born entrepreneur named Dean Mahomed opened a bathhouse in Brighton, England, and introduced this Indian-style massage. He styled himself a "shampooing surgeon," and the British upper classes were captivated by the exotic treatment. At first shampoo simply meant "to massage," but over time the sense narrowed to the act of rubbing and washing the hair in particular. Then, in the late 19th century, it became a noun for the soap product used to wash the hair itself.