<P> Blackballing is a rejection in a traditional form of secret ballot, where a white ball or ballot constitutes a vote in support and a black ball signifies opposition . This system is typically used where a club's rules provide that one or two objections, rather than an at - least - 50% share of votes, are sufficient to defeat a proposition . Since the seventeenth century, these rules have commonly applied to elections to membership of many gentlemen's clubs and similar institutions such as Freemasonry and fraternities . </P> <P> A large supply of black and white balls is provided for voters . Each voter audibly casts a single ball into the ballot box under cover of the box, or of a combination of a cloth and the box itself, so that observers can see who votes but not how they are voting . When all voting is complete, the box is opened and the balls displayed: all present can immediately see the result, without any means of knowing which members are objecting . </P>

Where does the expression black balled come from
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