"Sucks so hard that some a-holes live forever and some really cool people die young."
That's Joe Rogan keeping it honest on the death of Chadwick Boseman ... saying he was crushed when he heard the news of the actor's death.
"I just looked at the news and said, 'F*ck!!!!'" Rogan said on SiriusXM's "Unlocking the Cage with Jimmy Smith."
"Just instantly, "F*ck. That guy was cool."
Didn't seem like Rogan knew Boseman personally -- but it's clear from the interview Joe had a tremendous amount of respect for the "Black Panther" star .