To ostracize.
To vote against, especially in an exclusive organization.
A black ball used to indicate such a negative vote.
A rejection; a vote against admitting someone.
A kind of large black sweet; a niggerball.
A game, a standardized version of the English version of eight-ball.
A substance for blacking shoes, boots, etc. or for taking impressions of engraved work.
The opposite of a boycott: deliberately purchasing a company's or a country's products in support of their policies, or to counter a boycott.
To support (a company, country, etc.) by buying its products.