'Bumpkin' definitions:

Definition of 'bumpkin'

noun

A person who is not very intelligent or interested in culture [syn: yokel, rube, hick, yahoo, hayseed, bumpkin, chawbacon]

From: GCIDE

Bumpkin \Bump"kin\, n. [The same word as bumkin, which Cotgrave defines thus: "Bumkin, Fr. chicambault, the luffe-block, a long and thick piece of wood, whereunto the fore-sayle and sprit-sayle are fastened, when a ship goes by the winde." Hence, a clumsy man may easily have been compared to such a block of wood; cf. OD. boomken a little tree. See Boom a pole.] An awkward, heavy country fellow; a clown; a country lout. "Bashful country bumpkins." --W. Irving. [1913 Webster]