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Obnoxious partying males who are often seen at college parties. When they aren’t making an ass 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!"
bro by J Will May 8, 2005
Related Words
bro brooke Brooklyn brody brock brook Brodie brojob bromance Brown
NOT THE DEFINITION FOR DOUCHEBAGS.
Your bro is your homie(s) for life. Calling someone your bro declares automatically that you are down for life, that your bros come directly in front of thy hoes. Choose carefully who you declare as your bro, because some people could intercept this very wrongly and it could backfire. You could call strangers you interact with "man" and/or "dude" but "bro" is sacred.
Whats up bro? (to longtime friend/friend who has your back and vice versa)
bro by iceb3rg August 18, 2009
Mat is my bro
Bro by Santa July 1, 2003
Short for "brother". A way of addressing virtually anybody. Used much the same way as "bud", "buddy", "dude", or "man". Originally pronounced "bruh", nowadays it usually rhymes with "snow".
Sing a song, bro. (Jimi Hendrix, from "If 6 Was 9")
bro by Bro Dudely July 18, 2008
close friends; buds; pals; comradarie
hey, he's my bro, I watch his back, and he watches mine, we're like brothers, yah know?
bro by Ilianivich March 15, 2003
What a chick calls you when she's not interested in you. Usually this happens when you're just about to ask her out.
Boy: hey there I wanted to tell you that...
Girl: tell me what bro?
Boy: nevermind it's cool
Bro by notonxans April 14, 2020