noun an exceptionally naïve, conventional person. Delaware exists for the rhyme; it is no more or less square than any other state. In the 1930s and 40s, there was a cottage industry in inventing terms along the line of this construction – a 'clown from Allenton', a 'pester from Chester' and so on. The 'square from Delaware' was one of the few that truly worked itself into speech US, 1938