Brozay derived from broesy. Either is a more familiar and friendly way of calling someone "bro". Brozay is only to be used while on good terms with a person, whereas bro can be used to get any guy's attention. If you're really tight with the person or he did something especially cool, the ZAY part of the word needs emphasis.
"Brozay, how've you been? Haven't seen you around...."
"Yo broZAY, way to score with that chick."