brobituary Share definition Flag (n) announcement of a lost one: When one of your bro's ceases to exist from the bromosphere, due to a girlfriend, a job, or death. Nate is so whipped by Lauren... we never see him anymore. We have to write him a brobituary. brobituary by Capt_JD8 August 17, 2009 0 0 Get merch Get the brobituary mug. Buy Now — $32.95 See more merch