Douglas Harper's Etymology Dictionary
Wiktionary
tarbrush
alt. A brush used for applying tar n. A brush used for applying tar
Usage examples of "tarbrush".
You take some of them ragtag Muskogee Seminoles up around Lake Okeechobee, a lot of 'em's got a big swipe of the tarbrush, but you'd never know it from the way they act toward colored people.