To those unfamiliar with the term, a bromance is when two platonic guy friends spend a ridiculous amount of time hanging out together and are almost like a couple.
This is the subject of the year's best comedy (so far) "I Love You, Man". The film is about Peter (Paul Rudd, "Role Models", "Knocked Up") a real estate salesman who proposes to his girlfriend Zooey (Rashida Jones, "The Office"), and realizes that he does not have a best man.