Surpassingly good (Elizabethan English).

1

1836.  The Moselle was a new brag boat, and had made several quick trips.—The Jeffersonian, May 5, p. 96: from the Cincinnati Whig.

2

1847.  I filled [the kettle] up anew, thinking I would boil down a few pounds as nice as I could for brag-sugar.—D. P. Thompson, ‘Locke Amsden,’ p. 14 (Boston).

3

1857.  His parents were brought into the colony of New-York by an English slaver, and sold to a Virginia planter. Isaac had once been the ‘brag hand’ of the plantation; and his step was yet firm, and his eyes undimmed.—Knickerbocker Mag., l. 292 (Sept.).

4

1904.  A boy that blowed an army bugle come, an’ the brag singer, a young man that sung ‘Whar is my wanderin’ boy to-night?’ with sech deep sadness that even the old maids was sobbin’ an axin’ the’rselves the question in dead earnest.—W. N. Harben, ‘The Georgians,’ p. 160.

5