A bootblack is someone who cleans and shines shoes.
How It's Used
“He comes to America to earn his fortune and finds, in contrast to his bustling, beautiful home country, a dusty, desolate city full of predators. He sets up operations as a bootblack, but really enters the American economy only when an Irish ward heeler slips him a few bucks, urging him to get his Italian friends to vote for a corrupt councilman.”