A hick is an unsophisticated, rural person. Your accent and fondness for wearing overalls might make some people think you're a hick.
The word hick is both informal and derogatory — in other words, if you call your cousin who raises dairy goats and chickens a hick, she'll probably be offended. Hick is an adjective too: "I've got to get out of this hick town!" Hick was originally a nickname — like "Rick" — for "Richard," in the 14th century. Along the way, it meant both "hosteler" and "awkward provincial person."