What is "spoo"

Spoo is a fictional food product that served as a running joke within the Babylon 5 science fiction television series. In the series' fictional universe, spoo is made from worm-like creatures of the same name and is generally regarded as the most delicious food in the galaxy; the creature itself, however, is regarded with contempt by most species. Despite appearing only in a few episodes, spoo was embraced by fans and became part of the series' extended mythology.