(informal American) a person who lives in or comes from a rural or country area and who is regarded as being unsophisticated, unintelligent, and/or narrow-minded;
e.g. They wondered what a hick like him could have to say about international affairs.
(adjective)
unsophisticated, unintelligent, and narrow-minded;
e.g. She grew up in a hick town in the middle of nowhere but eventually moved to a big city.