Similar to your brother, or "bro", except on a much higher level of respect and prestige.
Rohan: Hey, could you do me a favor?
Matthew: Sure man, anything for a bratza.
An alternative to the words
coolin, cooling,
booling, or
chillin, used to describe your current state of existence.
Pooka: Yo Tank, what's up mane?
Tank: Shid bro, nuthin much, just cooln on break at work.