Brostalgia

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)

Brostalgia by The Sebastian November 21, 2009

Prostalgic 

a sentimental longing or wistful affection for the future, typically for a vision of what is likely to happen, typically accompanied with happy personal associations.

As I helped my father learn to use his new phone, I was overcome with prostalgia as I envisioned an older version of myself needing a similar level of care to master the holodeck. These prostalgic feelings almost always catch me in moments with my parents, especially now that I have a child of my own to track these passing years against.

Prostalgic by babs87 June 21, 2021