What is Black run?
Black run definition and meaning on Dictionary terms:
verb (used with object)
to vote against (a candidate, applicant, etc.).
to exclude socially; ostracize: The whole town blackballed them.
to reject (a candidate) by placing a blackball in the ballot box.
a negative vote, especially in deciding on an applicant or candidate.
a black ball placed in a ballot box signifying a negative vote.