triple apple day

So I changed the title of this weblog the other day, looking for something odder and snappier than just my name, since this has become more than just another place to post images of my artwork. what does triple apple day mean? Besides a prescription for healthy eating? It comes from my son and his misunderstanding of a line from the Johnny Test theme song. I like the way it sounds, and don't really know what it means, more than that.