The ewells are "poor white trash." explain this term according to what you know about the way they live and the kind of people they have appeared to be up to this point.
The Ewells in "To Kill a Mockingbird" are considered to be "poor white trash" because they are the poorest of the whites in Maycomb. They are not educated people and do not have any money. The only factor that makes elevates them in the town is the fact that they are white.