A fun fact about shampoo is that the word “shampoo” actually comes from the Hindi word “chāmpo,” which means to massage or knead the muscles. The word was first introduced to English speakers in the late 1700s by Indian merchants who brought their hair grooming practices to the western world. Initially, “shampoo” referred to a specific type of head massage, but over time it came to be associated with the product that is now commonly used to clean hair.