Related Clues:
- Rapidly spreading
- Spreading rapidly on the internet
- Like a clammy cave
- Clammy part in sprained ankle
- Like catacombs, perhaps
- Cold and humid
- Blowing up online
- Cold and damp, as a cellar
- Fast-spreading, as a Web video
- Damp in a gross way
- Clammy Daniel meets Kelvin
- Very popular, as an online video
- Mildewy, perhaps
- Epidemiological adjective
- Circulated in a flash to a large audience on the internet