I've been reading and thoroughly enjoying the anthology I, Alien edited by Mike Resnick. In particular I liked the story “Hi, Colonic” by Harry Turtledove, though you possibly need to have studied biology at school to get the joke. Anyhow, in this story one of the aliens is called "Iffspay" (we don't learn the other alien's name) and I'm wondering is "Iffspay" is a biological joke: maybe an anagram or the name of a species. But after much Googling I can't find anything. Does anyone know if it's a joke, or is it just some random word made up by the author?