wildfire

noun4

1. •
   A rapidly spreading fire, especially one occurring in a wildland area.
2. •
   (figurative) Something that acts or spreads quickly and uncontrollably.

   • “It was my own personal watch and I wanted to change the face,” she said in an interview during a recent business trip to New York. “I started wearing it, and it was wildfire — everybody wanted one.” — 2022
3. •
   (historical) Greek fire.
4. •
   A spreading disease of the skin, particularly erysipelas.