good question. according to the first online dictionary I used, it defines hick as "an unsophisticated, boorish, and provincial person; rube"
that definition is not too far off, even accounting for his ability to do brain surgery.
denial of evolution is pretty unsophticated.
saying that muslims should not be elected to president is pretty boorish, (unmannered; crude; insensitive)
"even accounting for his ability to do brain surgery"
something none of you ever could do, yet alone get into a medical school.
BTW, applying your definition, GGK, TTK, and Crux are all hicks.