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1.
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.
by Tepea February 28, 2011