When two or more "Bros" share a moment or a Broment and engage in an a very serious, close, embrace. Often happens at bars or parties after several drinks.
A more intense/intimate version of a Brug= Bro Hug.
Wow, Joe and Mark must have had a broment, because that's a serious embrose.
Any time you happen to be at a bar full of Bros and two of them are engaging in very animated, close conversation that turns awkwardly hilarious to the rest of us as they hug, tightly, several times.