A group of guys usually the age of 16-24. A closely bonded group of males (no homo) who are constantly drinking natty, and talking about their "bitches" making them sandwiches, even though the majority of them have never experienced a female actually abiding by their rules. They usually just stand around holding a red plastic cup waiting for something exciting to happen so they can scream something that demonstrates how much they enjoy partying. They usually over use the words Broski, chill, natty, bitch, and sandwhich.
You will be able to determine a bro by the way they dress.
Short shorts, polo or tshirt, oakleys worn behind neck, sandals, and a visor or hat either front or back.. never sideways.
The bros usually run the school, lord knows for what reason. They are usually followed by a group of "hoes" and these hoes and bros join together to make a pack of obnoxious delinquents.
The bros must always abide by the bro code.... no matter what. Its sacred.
Yo bro, lets get some hoes and hit up a party, sound chill?