Person 1: "Why didn't Rachel come to worktoday?"
Person 2: "Haven't you heard, she got blackmaled by Ta'Quante last night."
Person 1: "One must always take care when getting blackmaled."
This is the process by which a Black person acknowledges another black person's presence in a social environment where black people are scarce or otherwise absent. These environments include places and events like: lacrosse parties, ice hockey games, early morning classes, Russia and The Ku Klux Clan Annual General Meeting.
Blacknowledgement is a show of solidarity and support indicating to another black person that you understand their social anxiety and feel their inner torment.
A blacknowledgement can be executed using anything from a simple nod to a well executed six part, click and snap, integrated handshake. In less friendly situations, a blacknowledgement may be used as a territorial gesture. It can be used to signal to another black person that you are the resident black person in that environment and that they should cower off and find non-black friends of their own.
John: Did you hear about Sara?
Patrick: What happened?
John: I heard she spend all her graduation money on coke. I work for her dad. Should I say something?
Patrick: Only if you're trying to blacknail her.
2.) Verb (subjunctive): To be ostracized for having sex with an African American male.
From the word blackball (blkbôl): (noun) 1. A negative vote, especially one that blocks the admission of an applicant to an organization; 2. A small black ball used as a negative ballot.
Movie star Sue Lyon's career went on the rocks in the 1970s when Hollywood blackballed her after her second marriage to Roland Harrison, an Afro-American photographer and football coach, with whom she had a child.