Related Clues:

• Many a workout
• It doesn't last
• Short-lived fashion
• Angry Birds, e.g
• Planking or Tebowing
• Hula-Hoops or Furbys, once
• Pet rocks or the Macarena, e.g
• Short-lived trend
• Poodle skirt or parachute pants
• The limbo, once
• Angry Birds, e.g., in 2010
• Short-lived diet, perhaps
• It runs its course quickly
• It's hot, then it's not
• Fleeting craze