Definition of "biggity"

[T]he captains were very independent and airy—pretty ‘biggity,’ as Uncle Remus would say.

1883, Mark Twain, chapter 58, in Life on the Mississippi

"Oh, Jeff Wain!" returned the countryman slightingly; "yas, I knows 'im, an' don' know no good of 'im. One er dese yer biggity, braggin' niggers—talks lack he own de whole county."

1900, Charles W. Chesnutt, chapter 33, in The House Behind The Cedars

“Aint you talking biggity. I bet you better not let your grandmammy hear you talking like that.”

1929, William Faulkner, The Sound and the Fury, Folio Society, published 2016, page 15