A group of people, usually bros, within a group, club, or school organization or sports team. Usually the marching band. Who have similar interests and ideas.

A group of obnoxious partying males who are often seen at college parties. Bros actually chose this name for themselves as they often refer to each other as "bro" even though they are not related.

A squad of dorky teens that are cooler than you.

A gaming community based around bro tanks a.k.a. tank tops. It is a lifestyle choice and a good one at that. Although it hasn't been tested, most members are known to have extremely sexy butts.