Bro (noun)

1. A man who is a friend or comrade, typically one who is part of a group of friends.
2. Used as a friendly address to a man.

Origin:

Short form of 'brother'.

Examples:

1. My bro and I go way back.
2. What's up bro?
3. His bros were always there for him.
4. The bros went to the bar to celebrate.
5. Bro, can you give me a hand with this?