[sham.poo] vt [Hindi capo, imper. of capna to press, shampoo] (1762) 1 archaic: massage
2. a: to wash (as the hair) with soap and water or with a special preparation b: to wash the hair of -- sham.poo.er n
[2]shampoo n, pl shampoos (1838) 1: an act or instance of shampooing
2: a preparation used in shampooing