The Joker : Are you seriously saying there is nothing, nothing special about our relationship?
Batman : Whoa. Let me tell you something, J-bird. Batman doesn't do 'ships.
The Joker : What?
Batman : As in "relationships." There is no "us." Batman and Joker are not a thing. I don't need you. I don't need anyone. You mean nothing to me. No one does.
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From: The Lego Batman Movie (2017)