1. blackball - Noun
2. blackball - Verb
A composition for blacking shoes, boots, etc.; also, one for taking impressions of engraved work.
A ball of black color, esp. one used as a negative in voting; -- in this sense usually two words.
To vote against, by putting a black ball into a ballot box; to reject or exclude, as by voting against with black balls; to ostracize.
To blacken (leather, shoes, etc.) with blacking.
Source: Webster's dictionaryThe President vetoed the bill Source: Internet
Philadelphia remained on top of the blackball world until Foster left the team in 1907 to play and manage the Leland Giants (Frank Leland renamed his Chicago Union Giants the Leland Giants in 1905). Source: Internet
Rickey saw the opportunity as a way to convince people that he was interested in cleaning up blackball, not integrating it. Source: Internet
The " two-shot rule " of blackball may or may not be followed; this depends on individual players and/or pubs. Source: Internet