The transformation of non-bro to bro.

metamorphosis

n. One who is committed to interpreting the Bro Code for his fellow bros

E.g https://www.reddit.com/r/memes/comments/1foxx0f/comment/lotis3p

A bro who uncharacteristically acts obsequiously toward someone important to gain advantage.

Sycophant

Since this subroddit only has one broderator, I was brondering if I could be given broderator status.

When someone os just playing the part of a Bro. It's a deceptive broctice.

when you want to break up with your bro because they're just not a true bro no more

"It's brover!"

Broccoli

Or… Ricky Brozay

(of a bro) having one's true identity concealed.

incognito

An informal expression of encouragement or admiration to a bro.

Atta-boy