What is 4 Brothers?
Originally a film starring Mark Wahlberg, the idea was taken and used to describe a school clique. The term is used when four best friends are a group, but the group is so elite that some people may be kicked out and replaced by others.
Brother 1: So are the 4 brothers hanging out this weekend?
Brother 2: Sure man if you want.
Brother 3: Should be fun.
Brother 4: ...Tyler?