Yo straight up .. this is your homie, your friend or your partner. Pretty much a close person to you that's not just an aquatiance. Or can also be an agreement word.
What's up My gerusian. You down checkout a couple a birds a the local watering hole..."yea bruv ..gerusian"!
When you fail at something in life (eg. failing an exam or not getting a job), go home and spend an hour just standing in the shower, propping yourself up against the wall with your eyes on your feet.
Caleb knew the only thing to do after he didnt get prefect was take a failure shower.