Green’s Dictionary of Slang

1. plump, chunkily built.

1619		Fletcher Monsieur Thomas (1639) V i: What, are you growne so cornefed gooddy Gillian.
1796		J. Barlow Hasty-Pudding in Kettle American Poetry II 19: The invited neighbours to the husking come [...] Brown corn-fed nymphs, and strong hard-handed beaus.
1809		W. Irving Hist. of N.Y. (1826) 212: They grew up a long sided, raw boned, hardy race of whoreson whalers [...] and strapping corn-fed wenches .
1840		T. Haliburton Clockmaker III 101: A real corn-fed heifer that, ain’t she? She is so plump she’d shed rain like a duck.
1850		W.K. Northall Life and Recollections of Yankee Hill 125: There was two Sals livin’ in our town, Sal Stebbins and Sal Babit, — real corn-fed gals, I swow [...] Sal Babit, she was so fat, she’d roll one way jest as easy as t’other, and if anything, a little easier.
1862		‘Artemus Ward’ Artemus Ward, His Book 213: Your gals in particklar air abowt as snug bilt peaces of Calliker as I ever saw. They air fully equal to the corn fed gals of Ohio and Injianny, and will make the bestest kind of wives.
1901		S.E. White Westerners 120: Back in Chillicothie whar th’ hogs an’ gals is co’n-fed, they is sure bustin’!
1916		H.L. Wilson Somewhere in Red Gap 111: There was a corn-fed hissy in a plush bonnet.
1942		W. Pegler George Spelvin Chats 140: There were quite a few young corn-fed frauds of both sexes.
1946		B. Cerf Anything For a Laugh 57: The man who gets a chance to buss a corn-fed Texas beauty.
1960, 1975		Wentworth & Flexner DAS.
1962		(con. WWII) J.O. Killens And Then We Heard The Thunder (1964) 411: He was [...] blue-eyed and medium sized and corn-fed and Midwestern Yankee.
2000		S. Maloney Big Ask 41: Male number three was a stocky, cocky, corn-fed Steve McQueen.

2. (US) of high quality.

1907

W.M. Raine Wyoming (1908) 55: Y’u bet this dance is ace high [...] this dance ain’t in the order of culls. No, siree, it’s cornfed.

3. (orig. US) banal, provincial, naïve; of a jazz musician, old -fashioned.

1912		Ade Knocking the Neighbors 126: They effected the usual Compromise, falling gracefully into the awkward Embraces of two cornfed Lizards.
1914		Ade ‘The New Fable of the Lonesome Camp’ in Ade’s Fables 267: Thousands of warm-hearted New Yorkers were [...] giving royal Welcome to the Corn-fed Pilgrims.
1928		J. Callahan Man’s Grim Justice 89: She was just a nice, clean-cut, corn-fed, gum-chewing country girl.
1928		W. Winchell Your Broadway & Mine 20 Nov. [synd. col.] [S]language [...] in use among musicians. [...] To refer to an instrumentalist as ‘corn-fed’ or ‘tinny’ is to term his jazz interpretations old style or ‘has been’.
1931		(con. 1918) E.W. Springs Rise and Fall of Carol Banks 2: Having had his faith in womankind so completely shattered by his corn-fed Cleopatra, he kept close check on his affections.
1941		in V. Randolph Pissing in the Snow (1988) 75: Them cornfed floozies ain’t been around much.
1959		C. Himes Crazy Kill 90: Don’t give me that cornfed Southern bull.
1965		H. Rhodes Chosen Few (1966) 60: I’m what Marines refer to as a corn-fed chick.
1989		H. Rawson Dict. of Invective (1991) 96: Corny often is traced to corn-fed, meaning backward, provincial.
1999		E. Bunker Mr Blue 298: There was a bias against country boys as corn-fed fools.
2001		‘Randy Everhard’ Tattoo of a Naked Lady 7: This piece of 100% corn-fed cocktease.