Green’s Dictionary of Slang

jayhawk n.

[jayhawker n. ]

1. (US) a rustic, a simpleton, a novice, a newcomer.

[US]H.B. Allen ‘Pejorative Terms for Midwest Farmers’ in AS XXXIII:4 265: [...] jayhawk [...] jayhawker.

2. (US) a mythical bird used as an emblem of Kansas.

[US]Eve. Missourian (Columbia, MO) 29 Nov. 2/1: All is yours but a Jayhawn victory - on such generosities we draw the line.
[US]V. Lindsay Golden Whales of Calif. 19: Oh, the long-horns from Texas, / The jay hawks from Kansas.
[US]Chicago Daily News 14 Feb. 8/3: We [in Kansas] have Jayhawk theaters, Jayhawk restaurants, Jayhawk lumber yards; the fabulous Jayhawk is the insignia not only of our state university, but of scores of other concerns [DA].
[US]J. Ciardi Good Words 326: Jayhawk [...] The mascot of the University of Kansas.

3. (US) a native of Kansas [combines senses 1 + 2].

[US](con. c.1900) J. Thompson King Blood (1989) 74: Sooner [...] was to become an affectionate second-name for Oklahoma [...] as was Jayhawk for Kansas and Cornhusker for Nebraska.