BNIA Share definition Flag Big Name In America. A term to describe those who are reputable on the American continent. A variation on the term BNOC (Big Name On Campus). 'Taylor Swift is such a BNIA!''Miley Cyrus definitely classes as a BNIA''Justin Bieber? BNIA!' BNIA by F-Al November 1, 2012 0 0 Get merch Get the BNIA mug. Buy Now — $32.95 See more merch