pronounced "double you dee jay". stands for "we don't judge". Said by someone who is/could be judged for something they have just said or done.
jane: I'm going out with five different guys right now, and none of them know that we're not exclusive.
jennifer: omg! how could you do that?
jane: wdj, jennifer. wdj.
jennifer: omg! how could you do that?
jane: wdj, jennifer. wdj.
