Green’s Dictionary of Slang

jewhillikin adj.

(US) exemplary.

1882

E. Nye Forty Liars (1888) 99: I ask you, as the representative of the all civilizing, all levelling, all powerful and all jewhillikin press. [Ibid.] 141: Followed by the most jewhillikin gosh-all-hemlock exposition of camels with twisted tails, wappy-jawed giraffes and speckled hyenas.