She is born when Fluttershy had an enraged obsession with fuck with animals, Fluttershy's mind get corrupted and her body creates a new, evil, deadly and satanic personality called "Flutterrage". Flutterrage has short appearances in YouTube Poops, but the most appreciated would Awfulfawfulthefalafe videos, where she tries to kill Squidward, SpongeBob and Patrick. Lamentably for her, SpongeBob and his friends got escape.