Ember's latest expressions of frustration or annoyance are "Oh, bilge-water!" or occasionally "Oh sugar-water!" I have no idea where she has gotten these from as when I ask her "Where did you hear that?" she says "Nowhere, I just said it!" Given that bilge water is not common four-year-old vocabulary, I don't believe her! But I haven't heard it on any of her DVDs myself, and I know it's not from any of her stories.
Anyway, I quite like it and it's certainly better than the alternatives (!), but if anyone knows where these expressions might be from, I'd love to know.