Hula-Hoop
[ hoo-luh-hoop ]
/ ˈhu ləˌhup /
Trademark.
a brand name for a tubular plastic hoop, about 4 feet (1.2 meters) in diameter, for rotating about the body by swinging the hips, used for physical exercise or in children's play: introduced in the 1950s.
British Dictionary definitions for hula hoop
Hula Hoop
noun
trademark
a light hoop that is whirled around the body by movements of the waist and hips