A basic foreshadowing concept and lore of some hetty event that will happen in the future. This phrase is predominantly found in the jamband scene. Brah is slang for bro. A major brahphacy was fufilled when Phish reunited in Hampton VA in 2009!
The annoucement of the reuninting of Phish proves that the "Brahphacy" has now been fufilled.
by Deemsters Roasters March 14, 2009