A country fellow.
1639. So. Mr. Bostock, madam. Lu. Retire, and give the jay admittance.Chapman and Shirley, The Ball, ii. 2. (N.E.D.)
1897. Im what they call a jay in Harvard, and Harvard dont count if youre a jay.W. D. Howells, Landlord at Lions Head, ch. xxiii.
1904. I acknowledge I felt like a plumb jay from the backwoods.W. N. Harben, The Georgians, p. 189.