Related Clues:
- Post that goes viral
- Mood rings, e.g
- Trend seen regularly in fraud
- Sheds uninherited characteristic?
- Rickrolling or the Dancing Baby, e.g
- Coonskin caps, in the 1950s
- Viral YouTube video, e.g
- Rage following promotion
- Brief vogue
- Something everyone's doing
- Much-shared GIF, maybe
- Fleeting interest
- It spreads rapidly online
- Fidget spinners, evidently
- Post gone viral