The Weebabeast is a creature from Fraggle mythology; in the days when the Rock was small, the Weebabeast guarded the Great Bell that lies at the Rock's heart.
The dance of the Weebabeast is an important Festival of the Bells tradition. Five Fraggles don the Weebabeast costume, which operates in a similar fashion to a Chinese dragon, and dance around while singing "Weeba Weeba!"