Green’s Dictionary of Slang

(US) reasonably affluent, comfortable.

1822		Murphey P. I 263: His brother is well fixed [DA].
1880		in M. Lewis Mining Frontier (1967) 128: The old man was purty well fixed.
1887		G. Devol Forty Years a Gambler 144: I saw he was well fixed, and so I asked him how he made his money.
1903		D.S. Crumb ‘Dialect of Southeastern Missouri’ in DN II:v 336: well-fixed, adj. Wealthy; well to do.
1912		Ade Knocking the Neighbors 32: I have a Boy named Bertrand and a little Girl named Isabel and my Wife and I have decided that it is our Duty to leave them Well-Fixed.
1925		Z.A. Tilghman Dugout 70: You’ll be well fixed [DA].
1936		J. Curtis Gilt Kid 106: I’m going on a job to-night and I’ll get a big pile out of it. Plenty of the old vodeodo. I’ll be well fixed.
1953		R. Chandler Long Good-Bye 268: When things quiet down we may get married. She ought to be pretty well fixed. I haven’t made a buck out of the Wade family yet. I’m getting impatient.
1965		L. Dunne Goodbye to The Hill (2014) [ebook] Not that there weren’t a few ‘well-got’ families in the flats. It was just that they seemed so out of place that it was difficult to think of them belonging [BS].