a ducking film
I assume a typo and not a recognition of RP's fondness for immersing women in water to murder them, fictionally speaking.
I still think Chinatown is one of the greatest films ever made, not least for the irony in its message that rich, powerful men with connections will always get away with anything they choose, including murder and, in the case of Noah Cross, raping his own grandaughter born by raping his own daughter. (Spoiler alert, sorry.)
When Private Eye Gittes asks Cross what more he could possibly want to have with all his money, he is adament, "The Future, Mister Gittes."