1. A word a bro might say to express something awesome, intense or fun. Used especially in a party setting to describe the amount of alcohol consumed or successful bagging of a girl.
2. Used to describe something a bro would like, specifically an article of clothing or car.
"Last night at Chad's party, Mark chugged three 40 oz. and chased them with jungle juice. It was so brodacious."
"Dude, did you see those A&F frayed visors and those Lacoste polos over there? Man those are brodacious!"