1590s, anglicized spelling of French pronunciation of debauched "dissolute" (see debauch). Obsolete in England after mid-17c., retained in Scotland, and given a revival of sorts by Scott (1826), so that it turns up in 19c. literary works.
Also, what Enright says to that deboshed stage driver for so doin'.
His appearance was that of a deboshed City clerk, as he was.
He was eloquent on the moral uplift of a simple, old-world life presented in its entirety to a deboshed civilisation.
The one part scared the virtuous, at the other the deboshed yawned.
That settled, I sacks that hamlet of Red Dog, an' plows an' sows its deboshed site with salt.'
"deboshed" is a reminiscence of an essay of Lowell's on Reconstruction, in which he makes light of Southern claims to aristocracy.