Related Clues:

• They tend to be short-lived
• Wild excitements
• Bieber Fever and the like
• Big Mouth Billy Bass and things like that
• Short-lived rages
• Going concerns?
• Obsessions
• Briefly hot stuff
• Fashions or vogues
• Is he one, as they're all mad?
• Over-the-top fads
• Furbys and yo-yos, once
• They're not hot for very long
• They're fleeting
• Planking and pogoing, e.g