1. (adj./adverb)The act of helping out your fellow bro.
2. (adverb) Furthering your status in the bro community (bro-mmunity).
1. "When Sean bought his thirsty friend Justin a Powerade after a hard game on ultimate frisbee, he was being very broactive.
2. "Mark broavtively stopped his friend James from making out with their friend Mike's girlfriend."