Hula-Hoop

[hoo-luh-hoop]
Trademark.
  1. 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.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018