Green’s Dictionary of Slang

(US black) chewing tobacco.

1834		W.A. Caruthers Kentuckian in N.Y. I 103: ‘Not your chaw-tobacco parson, I hope?’ ‘And why not? What if he would roll his chaw-tobacco into one cheek at you, while he coupled you up with the other?’.
1858		G.W. Harris ‘Sut Lovingood’s Chest Story’ Nashville Union and American XXIX June in Inge (1967) 124: Gin us a chaw terbacker.
1965–70		in DARE.
1994		C. Major Juba to Jive 89: Chewtobaccy n. (1900s–1940s) a piece of chewing tobacco. Example: ‘He spits his old nasty chewtobaccy everywhichare!’.