blackball
verb- blackball somebody
to prevent somebody from joining a club or a group by voting against them 投票反对（某人加入俱乐部或团体） He was blackballed when he tried to join the Country Club. 当他试图加入乡村俱乐部时，被拒绝了。
Word Originlate 18th cent.: from the practice of registering an adverse vote by placing a black ball in a ballot box.