A wistful or excessively sentimental yearning for return to a past period with your bro or bros.
Dude: Yo, let's steal the napkin-holder from this bar.
Widowed-Bro: . . . nah (disappointedly turns away)
Dude: You alright man?
Widowed-Bro: . . . (Thinking about a time he and his bros took a road trip to New Mexico and stole a horse-cop's horse and used it to commandeer an oxen and 12 hundred dollars worth of cattle)
Dude: Dude!
Widowed-Bro: Sorry . . . just thinking about this thing me and my bros once stole
Dude: You need to stop being so brostalgic and live in reality.
Widowed-Bro: I can't help my brostalgia. I loved Ted "T-Killa" Jones. He was my main bro . . . Goddamn it! I told him not to play 13 consecutive games of Flip Cup with Everclear grain alcohol. (A single brostalgic tear rolls down his cheek)
Like sisstalk. When you goonline to find information in profiles, etc. about what's going on in your brother's life because it's easier than picking up the phone and calling him.
Jane: My brother bought a new car.
Jenn: You called him?
Jane: No, he never answers his phone. I just brostalked him.
Boxstartz is a talentless entity with little to no gun skill, attempting to converse with this sorry excuse of a human being is the equivalent of talking to a brick wall.