The term Edwardian Expletive refers to the use of mild swear words during the Edwardian era in England, which lasted from 1901 to 1910. The two most common examples of these words are 'egad' and 'DRAT'. Egad is an expression of surprise or dismay, while DRAT is used to express frustration or annoyance. Both words were considered socially acceptable during the Edwardian era, and were often used as a substitute for stronger language.