verb. ['ˈblækˌbɔl'] vote against; refuse to endorse; refuse to assent.
noun. ['ˈblækˌbɔl'] the act of excluding someone by a negative vote or veto.
verb. ['ˈblækˌbɔl'] expel from a community or group.
1. Verb, base form This type of person might talk poorly to former colleagues, say negative things about you through industry organizations or trade groups, or attempt to blackball you with clients and vendors by spreading false and misleading information.
