It’s a subculture revolving around “bros”. Bros are men, usually college aged, that like to hang out watching/playing sports, drinking beer, throwing parties, etc. They usually tease each other, banter heavily, and make lots of dares. “Bro Culture” is the subculture of society of “bros”. The culture has a lot of haters, but at the end of the day they have their bros.
Kid: “hey bro have ya seen the real bros of Simi Valley?”
Kid: “ya, I don’t get the jokes, I am not that into bro culture.”
Kid: “ya, I don’t get the jokes, I am not that into bro culture.”
by Sloothunter42 December 6, 2018
Get the Bro Culturemug. by Danstinywang September 27, 2014
Get the bro-capmug. Redditors who believe the Coronavirus crisis is "Just Flu, bro" and that the world is overreacting to the deadly pandemic. They generally believe in the Iceberg theory that the majority of people are infected already, and that herd immunity is just around the corner, and want lockdown to end now, as they put the economy ahead of lives. Tends to be Trump supporters and right-wingers.
Hershie23: With how the disease has spread and the limited testing, there can be little doubt that the numbers of people infected are far higher than reported, and thus the rates of mortality much lower; unless everyone is tested before the removal of any lockdown measures then this number will only grow and, again, the herd immunity slowly begins to build.
Woke person: You are just one of the flu bros.
Woke person: You are just one of the flu bros.
by Surur April 15, 2020
Get the Flu Brosmug. bro thunder is when there is a bro brawl in the vicinity and they go so hard that it shakes the surroundings and one may think they are experiencing extreme weather.
"dude did you just hear that?" "Yeah, I didn't know it was supposed to storm?" "No it's not storming, it's the bros next door brawling so hard our walls are shaking" BRO THUNDER. #Zeus
by apartmentf8problems November 15, 2011
Get the bro thundermug. 
Get the Bro-homiemug. A group of guys that haven't seen each other in awhile getting a little extra bromantic with each other.
The guys trip to Vegas turned into a total bro-union as they hadn't all seen each other in years and had been drinking steadily for 12 hours.
by HeyCoooooooory April 7, 2010
Get the bro-unionmug. by Massive Monster Tree August 16, 2011
Get the Seriously, Bro?mug.