Related Clues:
- Much-shared video, e.g
- Pet Rock, once
- Fast-spreading video, e.g
- Many an image from 'SpongeBob SquarePants,' on the internet
- Pervasive idea
- What may go in one year and out the other?
- Widespread trend
- Fast-spreading Web post
- Many a Facebook post
- Fidget spinners or Furbys, once
- Joke that goes viral on the internet
- Selfish clamour that's passed non-genetically?
- Viral cultural element
- Fleeting trend
- Pokémon Go, in the late 2010s, e.g