User blog comment:TitanicMixGirl/The Next Gravity Falls Episode Comes Out!!!/@comment-76.250.152.78-20130116221846/@comment-5539085-20130117001033

Maybe, but I think it just stands for Dipper. Some theroies where that since Alex Hirsch and Ariel Hirsch both have an "A" in the 1st letter of there name, maybe Dipper's real name starts with an "M". Since Mabel starts with an "M". I was thinking Dipper's name could be Mark, or Marivn, or something like that. But i like your theory too. We'll all just have to wait and see...