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.
Examples from the Web for deboshed
Also, what Enright says to that deboshed stage driver for so doin'.
His appearance was that of a deboshed City clerk, as he was.The Ivory Gate, a new edition
The one part scared the virtuous, at the other the deboshed yawned.The Mountebank
William J. Locke
He was eloquent on the moral uplift of a simple, old-world life presented in its entirety to a deboshed civilisation.A Diversity of Creatures
That settled, I sacks that hamlet of Red Dog, an' plows an' sows its deboshed site with salt.'