Bro-fella (n.) refers to a male person (also known as a fella) who is extremely close and endeared to someone, almost like a brother.
This term is a hyper-recent iteration of the term bro, and is used commonly by young people between the ages of 1-29.
I wanted to sleep with Stacy so bad, but unfortunately she doesn't see me that way and now I'm in her bro-fella zone.
Bro-fella, how about you and I start a business together?
I've known Jim since I was nine and a half years old, and he is my bro-fella.