Whether they use the term white trash or not, most Americans are unaware of its long and ugly history. If you had to guess, you’d probably say that the term arose in the Deep South, sometime in the middle of last century, as a term that whites coined to demean other whites less fortunate than themselves. Yet most of what we presuppose about the term is wrong.
The term white trash dates back not to the 1950s but to the 1820s. It arises not in Mississippi or Alabama, but in and around Baltimore, Maryland. And best guess is that it was invented not by whites, but by African Americans.