Bro

A male or (supa awesome ) female that you Dont bail on . You got each others back. You make fun of them, and still buy them a shot. Secret handshakes may be involved. You may nick name each other with the word BRO in it.

But like fight club.. You're not supposed to talk about it..
Oh wait . shit.

Brolos: "hey! Fuck your other people we ate watching game of thrones tonight"

Bromantha: "you're goddamn right!"