Stupid and ignorant like proverbial rural inhabitants(adjective)
WordNet. Princeton University. 2010.
Use "yokel-like" in a sentence
"The men stared with blank and yokel-like eyes at him."
"Velasquez clearly inspired them; but there never was in his work any of the noble delicacies of the Spaniard; it was always nearer to the plainer and more -- forgive the phrase -- yokel-like eloquence of Hals."