The phrase "south of the Mason Dixon line" refers to the geographical area in the United States below a line demarcated by the Mason-Dixon survey in the 1760s. The key pronunciation difference in this phrase is the pronunciation of the "ou" in "south." It is pronounced as a diphthong in American English, like the "ow" sound in "cow" (sowth). In IPA transcription, it is written as /saʊθ/. This is in contrast to British English, where "south" is pronounced with a diphthong like "couch" (sʌʊθ).
The phrase "south of the Mason-Dixon Line" refers to the southern regions of the United States, particularly those states located below the imaginary border forming the Mason-Dixon Line. The Mason-Dixon Line is a historic demarcation line originally surveyed in the 1760s between Pennsylvania and Maryland, later becoming the legal boundary between the free states of the North and the slave states of the South during the early 19th century.
As a colloquial expression, "south of the Mason-Dixon Line" has come to characterize the cultural, sociopolitical, and historical distinctions associated with the southern states. This region is typically characterized by its warm climate, agricultural tradition, distinctive dialects, and cultural heritage. The phrase can also evoke certain stereotypes such as hospitality, conservatism, and a slower pace of life.
Beyond its geographical significance, the phrase "south of the Mason-Dixon Line" often alludes to the historical context of the American Civil War and the states that seceded from the Union to form the Confederacy. Over time, it has become synonymous with identifying a particular subset of states that share similar historical, cultural, and symbolic connotations.