a group of exactly eight bro's; these bro's would take bullets for each other and always have each bro's backs. There is nothing that can split a broctagon apart.
by Drock Birdman February 07, 2011
a nerdy friend. brother like relationship but nerdy like a square. a combination of the word bro and octagon
sup broctagon, you be chillin with me or what
by NICONATOR December 15, 2009