From Longman Dictionary of Contemporary Englishblackballblack‧ball /ˈblækbɔːl $ -bɒːl/ verb [transitive] PPVSSOto vote against someone, especially so that they cannot join a club or social group→ See Verb table
Examples from the Corpus
blackball• In 1962, Freed was fined $300 and blackballed from radio.Origin blackball (1800-1900) Because a black ball was used for voting against someone 