Definition - a simple way to address someone, my friend, my fellow oppressed brother. can also be used to address girls tho.
History - Derived From Brother, In the early 1990's it was revised to Bro, around 2001 uptown NYC dropped the ro from bro and started refering to their boys (friends) a B. One might even call a girl b. Made popular in NYC by Camron and the Dipset crew. Brought to South California by Zachy H. and the Upsho Crew.