1532 François Rabelaism, Gargantua and Pantagruel, volume 2 (p685 of 2009 BiblioBazaar publication)
[She...] bathed his jobbernowl thrice in the fountain; then threw a handful of meal on his phiz [...]
1827 "Schmelzle's Journey to Fletz," Blackwood's magazine, volume 22, p480
Deeply stooping through the high posthouse door, issues the Giant, heightened by the ell-long bonnet and feather on his huge jobbernowl.
1834 William Harrison Ainsworth, Rookwood: a romance, volume 2, Carey, Lea & Blanchard, p111
His toggery was that of a member of the prize ring – what we now call a “belcher” bound his throat – a spotted fogle bandaged his jobbernowl, and shaded his right peeper, while a white beaver crowned the occiput of the Magus.
1868 William Conant Church, "The Ballad of Sir Ball," The Galaxy, volume 5, p329
He stood on the backs of his brace of hacks, in equitation foul; / And either donkey wore what seemed a human jobbernowl.
2006 Pamela Aidan, Duty and Desire: A Novel of Fitzwilliam Darcy, Gentleman, Simon and Schuster, p266
Trenholme groaned softly in the background, eliciting a sharp command from his brother to “shut his jobbernowl.”
“And a noodle and a jolt-head; you’re a jobbernowl and a doodle, a maundering mooncalf and a block-headed numps, a gaby and a loon; you’re a Hatter!” I shrieked the last epithet.
1906 Natsume Sōseki, I Am a Cat (p189 of 2001 publication by Tuttle Publishing)
That he pays not the least regard to the requirements of convention marks him out as either a superior soul or a rightdown jobbernowl.
1941 Evelyn Eaton, Restless are the Sails, Harper & Brothers, p10
"What Satan's song is that, looby jobbernowl?"
1953 Roger MacDougall, Escapade: a play in three acts, Heinemann, p24
STELLA: [...] You’re a – a jobbernowl! / JOHN (arrested): A what? / STELLA (reluctantly): Jobbernowl.
1999 Henry Mitchell & Allen Lacy, Henry Mitchell on Gardening, Houghton Mifflin Harcourt, p79
When I discovered I could grow it here — I like to say any jobbernowl can — I was as pleased as a dog with two tails.