When you have any sexual or romantic relations with a bros family member.
Bob is into brocest. Mans fucking Tom's sister.
by BONTYYYY August 10, 2017
Get the Brocest mug.
When one "bro" (typically a frat boy) engages in a sexual act with another "bro", regardless of whether or not the two "bros" are actual biological relation.

Potentially the consensual form of brorape.
Todd: Hey bro, me and Chad banged last night.
Brad: That's brocest, bro.
by fazer1 January 27, 2011
Get the Brocest mug.
What you call incest when two kids are kicking your ass on CoD:MWF2 and giggling on the microphone about it.
"Wtf is this shit on my tv? Incest? Brocest? GTFO."
by Anasaki March 8, 2010
Get the Brocest mug.
When one bro has sex or does sexual activities with another bro, regardless of if they are related or not
Matt: Me and clint did it last night bro.
Joe: Thats brocest bro.
by Brosephh32 October 4, 2011
Get the Brocest mug.
When two people within a friendship group, especially two men within a fraternity, start dating and make hanging out as a group feel really weird
Ricky: dude it feels so weird since Johnnie and Marko started dating
Jo-dog: thats homophobic brah!
Ricky: nah dude, its not the gay thing, its just... *gazes off into middle distance* ...thats /brocest/ man
by Skadylan April 18, 2015
Get the Brocest mug.