BLACK SNAKE; BLACKSNAKE n.
A snake of a black color, of which two species are common in the United States, the Bascanium constrictor, or racer, sometimes six feet long, and the Scotophis Alleghaniensis, seven or eight feet long.
BLACK WASH; BLACKWASH n. 2 definitions
A wash that blackens, as opposed to whitewash; hence, figuratively, calumny. To remove as far as he can the modern layers of black wash, and let the man himself, fair or foul, be seen. C. Kingsley.