Once upon a time, the great Greek God Brometheus, the greatest of the 'Bros', stole beer from Zeus so that he could help out his other bros and have a wild, awesome party. Zeus, furious that he no long had any beer that he could use to rape various immortals and morals (i.e. Europa), thus had Brometheus tied to a chair and had an eagle eat his cirrhosis-inflicted liver, getting blood all over Brometheus's popped-collar shirt.
Dude 1: "Hey everybody, this party is in memory of Brometheus, king of all Bros!"
Everybody: Hail Brometheus!