A phrase, mostly used by friends and concerned lovers, to express a feeling of unease over one's current path of action, on the intuition that this path may lead to a violent end, sometimes but not exclusively by crucificationism.
Also can refer to acute messianic megalomania
Guy 1: Dude, I'm totally gonna go piss off those Roman soldiers by pretending to be the Messiah!
Guy 2: Don't be Jesus, man.
Guy 3: I CAN HEAL THE BLIND!!!1!
Guy 4: Whoa whoa, don't be Jesus now.
The Fandom of the boy group BTS is called ARMY and some of them made the term "Jesus would be an army". If Jesus would still be alive, he would definitely be an army, because nobody can resist BTS.