I agree with the majority here, when I say "TBR", what I really mean is "the unread books currently on my shelves". I wouldn't include books I don't physically own in this.
With regards to wish-lists, oh, I've got you all beat. Wish-list, pffft. Wish DATABASE, is what I have. Which I can sync with my phone and refer to when I go book-shopping. Or, I would, if I ever remembered.