1. Stupid white trash guys in the 909 with lifted trucks, wife beaters, ****ty music (usually the most popular rap, hardcore, and nowadays emo) ugly girlfriends, ugly hair, mouths constantly open, retarded as all get up, have no common sense, think its cool to park half on the curb half off, put Flowmaster exhausts on Nissan Hardbodies and Toyota longbeds, don't realize that a huge lift job and giant tires ****s up your gears, which in turn equals less power. ****.

I saw some OC bitches and some bros fighting last night. I was hoping they'd kill each other off, but I had to do it for them.

2. a usually white young male, found commonly in places like san bernardino county in california, as well as orange county. always, without exception, drive big lifted trucks, often white. has the name of their crew or whatever in big white letters on their back window (ie, "skin", "metal mulisha". wear: trucker hats off center, plug earrings, sunglasses, wife beater shirt or no shirt, sagging ****ies shorts, high black socks, skater shoes or those black corduroy slipper things, have a lot of tatoos of things like stars.

my neighbor is a bro. hes got the lifted loud truck, wears the stuff, and even has a confederate flag hanging from his rearview mirror.

3.Obnoxious partying males who are often seen at college parties. When they aren’t making an *** of themselves 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. Nearly everyone in a fraternity is a bro but there are also many bros who are not in a fraternity. They often wear a rugby shirt and a baseball cap. It is not uncommon for them to have spiked hair with frosted tips.

Bros actually chose this name for themselves as they often refer to each other as "bro" even though they are not related.

I couldn't go to sleep last night because some bros at the party next door kept screaming, "Whoooooo!!! YEAAHHHHH! Whooooooo!"