Related Clues:

• Hula-Hoops or Furbys, once
• 6-Across nickname, with "the"
• Expression of what happens when demo gets out of hand
• Manner of expression
• Neap or ebb, e.g
• Pet rocks or the Macarena, e.g
• Short-lived trend
• It's all the style to disturb demo
• Polling information
• Symbolic sum of 17-, 22- and 50-Across
• Trend metaphor
• Poodle skirt or parachute pants
• The limbo, once
• Angry Birds, e.g., in 2010
• Short-lived diet, perhaps