When a Bro commits an act that is considered bogus to another Bro.
Bro #1 - "Hey, Bro. Don't be mad, but I hooked up with your ex last night at a party."
Bro #2 - "Bro, why you do me Brogus?"
Bro #1 - "Sorry Bro, I didn't mean to do you Brogus. She was just coming on to me, and I thought that it was cool since you guys broke up like, a year ago."
Bro #2 - "We broke up last week, Bro. That was so Brogus."