From Longman Dictionary of Contemporary Englishyokelyo‧kel /ˈjəʊkəl $ ˈjoʊ-/ noun [countable] STUPID/NOT INTELLIGENTsomeone who comes from the countryside, seems stupid, and does not know much about modern life, ideas etc – used humorously
Examples from the Corpus
yokel• Who but Ashton would have thought of giving this country yokel so delicate a movement?• And then we could have dances - grown-up ones, for the yokels and their sweethearts.• The place looked clean and secure, the yokels doltish but harmless.• Nature alone can not influence an unschooled yokel.Origin yokel (1800-1900) Perhaps from yokel “green woodpecker” 