Your bro who has a gnarly beard just like yours. Combining the word bro and beard creating beardbros.

v. collectively or individually finding someone/something to blame for a problem, as opposed to brainstorming which connotes finding solutions to a problem

n. the act of finding someone/something to blame for a problem

(from a TV ad for HD television)

When two people in public who have beards see another man with a beard and immediately have a connection. Beard bros are made purely on having a beard and nothing else