1. Many people know Joseph Stalin as a harsh and cruel dictator, but his closest friends (Bros) knew him differently. Recent photographs show Joseph Stalin sporting a bright red polo (a novelty at the time) double fisting 2 nattys watching two of his primo bitches wrestle for his attention. A voice recording shows Stalin calling the cold war "chill as fuck" and and even going as far as stating "shit I would lax if it wasn't so damn cold outside"
2. Someone who appears completely unchill and unbro, but takes on the full bro persona in the presence of other bros.
Man Sully's a real Broseph Stalin at work, but when the bros come over, the fists start pumping.
Ryan: "Dude, I was in a bad place for such a long time, and if it weren't for Joe St. Broseph here, I probably would have ended up in the gutters somewhere."
a hybrid between broseph and broski. All three a more affectionate term for bro, dude, man, etc and all are interchangeable. Typically used with your close friends who do not have vaginas.