adjective, or·ner·i·er, or·ner·i·est. Dialect.
Origin of ornery
Examples from the Web for orneriest
It disgusted Tom Sawyer, and he said it was the orneriest, low-downest thing he ever heard of.Tom Sawyer, Detective|Mark Twain (Samuel Clemens)
We're bleedin' an' dyin' an' bein' captured by the orneriest villains outside o' hell—as the feller says.Anderson Crow, Detective|George Barr McCutcheon
An' didn't he bring in four of the orneriest cusses that ever lived when they busted the Hart River cache?Connie Morgan in the Fur Country|James B. Hendryx
But this little thing is the orneriest critter I ever run across.Ticktock and Jim|Keith Robertson
Yer the orneriest ostrich fur a man of yer keerful eddication!Old Gorgon Graham|George Horace Lorimer
adjective US and Canadian dialect, or informal
Word Origin for ornery
1816, American English dialectal contraction of ordinary (adj.). "Commonplace," hence "of poor quality, coarse, ugly." By c.1860 the sense had evolved to "mean, cantankerous." Related: Orneriness.