British colonists began making cheddar as soon as they arrived in America. By 1790, American cheddars were being exported back to England. The British referred to American cheddar as "American cheese," or "Yankee cheese," and post-Revolution Americans promoted this usage to distinguish the exports of their proud new nation. That is, “American cheese” is used to distinguish it from European cheese. For example, an 1878 newspaper article in The New York Times lists the total export of American cheese at 355 million pounds per year, with an expected growth to 1,420 million pounds. Originally, the British considered American cheese inferior in quality; still, it was relatively cheap, so it sold. Unfortunately this connotation of the term American cheese became entrenched in Europe even after the Americans began producing quality cheese. Another article from 1878 mentions that the high quality American cheese is usually re-labelled under European names after export, with only low grade cheese retaining American labelling in Europe. It also states that even in the United States quality American cheese is often relabelled, etc, and that this situation is a detriment to the reputation of American cheesemakers. This practice may be in part responsible for the name "American cheese" being synonymous with bland, low quality cheese. "American Cheese" continued to refer to American cheddar until the advent of the processed cheese that now commands the title. Meanwhile, Americans themselves referred to their cheddar as "yellow cheese" or "store cheese," because of its popularity and availability. Sometimes it was called "apple-pie cheese," after its common pairing with that other iconic American food. By the 1890s, once cheese factories had sprung up across the nation, American cheddar was also referred to as "factory cheese." And in the 1920s another slang term arose for the still popular cheese: "rattrap cheese," or "rat cheese." **I got this information from: http://en.wikipedia.org/wiki/American_cheese