The slang term (correctly spelled)
'brah' came from the Hawaiian surfing community...
not the inner city urban community.
In Hawaii, the "shaka" sign, a hand gesture with the thumb and pinky extended with 3 middle fingers folded down into the palm, is a greeting commonly used in the surfing community. (contrary to some belief it does not mean "hang loose" ).
The shaka hand sign is what the Hawaiian surfers use to represent the term "shaka brah" ..... or greetings brother.
The Urban word to say brother is 'bro'. Hell.... even urban dictionary.com got it right that the term is spelled 'brah' and originated in the Hawaiian surfing commnity.
I don't mind the term 'brah'....when used correctly.... it's actually fun to listen to surfers talk in their slang.....
When I see someone post using the word as 'bra' I have to laugh because they are trying to be 'cool' using slang..... but they don't even know how to correctly spell the slang they are using. It doesn't make them come off as cool..... kinda the opposite.... uneducated and/or really really young... as in 13.
LOL.... let the rock throwing begin