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

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