From Longman Dictionary of Contemporary Englishbumpkinbump‧kin /ˈbʌmpkɪn/ noun [countable] informalSTUPID/NOT INTELLIGENT someone from the countryside who is considered to be stupid
Examples from the Corpus
bumpkin• Too much drawl and a Southerner sounds like a bumpkin.• I felt like a country bumpkin in his bib overalls laughed right out of a formal ball.• Privately he thought Tom Hendry was a bit of a country bumpkin.• At least in local memory, the country bumpkins finally got the best of Goodrich.• Our image as a bunch of bumpkins who roll over for anything that comes down the pike?• Queequeg quickly fastens the boom and then dives into the freezing water and rescues the bumpkin. 