I've always thought that the Jews and the Amish are onto something in having a term that means "everybody but us" (goy/Gentile and English, respectively). I've often wanted one a little less cumbersome than "non-Lutheran," for example. And for our specific purposes, "contraceptor" or some other less savory options I've heard don't really strike me as something I want in my regular vocabulary.
As a solution, we've discussed in our household using the term "Sulvan" to designate the folks who just don't want to have babies, God bless 'em, from the third book of CS Lewis' Space Trilogy. Sulva is the name of the moon in the book, and its inhabitants have succeeded in making life almost entirely inorganic (and much more convenient as a result, of course). Later in the book you learn that some characters have botched up the solution to a pressing problem by using contraception and not having the baby who was supposed to fix things (see part of the discussion at the bottom of this post). Someone makes a comment about such behavior being a practice of Sulva. So there you have it: Sulvan. May it be as useful for you as it is for me.