Green’s Dictionary of Slang

1. (US Und.) to improve one’s financial position; to amass money.

1963		A.S. Fleischman Venetian Blonde (2006) 165: I scraped dirt under my fingernails and found a poker game [...] I got well overnight.
1968		(con. c.1900) J. Thompson King Blood (1989) 26: Money-wise, they began to ‘get well,’ as the saying goes.
2012		W. Keyser ‘Carny Lingo’ in http://goodmagic.com 🌐 Military Payday — Oh, lordy, everybody's gonna get well today!

2. (US drugs) to inject narcotics to stop feeling ‘sick’.

2000		W.T. Vollmann Royal Family 344: Please, Domino, I need to get well. Oh, all right. Here’s ten dollars. [Ibid.] 670: Now I know how my heroin junkie friends feel when they fix. They call it getting well.
2008		R. Price Lush Life 345: I gave her a hundred dollars to get me something, you know, get me well .
2012		G. Pelecanos (con. 1972) What It Was 36: Vaughn slipped him twenty dollars. ‘Go and get well,’ he said.
2019		N. Walker Cherry 234: ‘How is it?’ [i.e. heroin] she asked. ‘It’s so-so.’ ‘As long as it gets me well, man’.
2020		D. Winslow ‘Sunset’ in Broken 209: The guy is holding [...] Terry Maddux is about to get well.