A life of ease. Although linguistic history fails to reveal who the eponymous Mr. Reilly was, the phrase was traced to the mid-19th century's Irish immigration to the United States. The phrase was used in popular songs and on the stage, and was most recently used as the title of a very successful radio program and later television series starring William Bendix as Chester A. Riley, whose signature comment, “What a revoltin' development this is,” became a popular expression during the mid-20th century.