"Howdy doo! I love you!" - Pizza's only words before screaming as she is consumed.
Pizza is an imaginary friend who only appears in the episode Seeing Red. This unwanted (but delicious) creation is disposed of via the ingenious method of being eaten by Terrence, who then creates Red, the real star of that episode.
Slice of Pizza is the first imaginary friend whose creation the viewers witness. She is also the only character in the series who seemingly "dies".