wildfire

noun

1. (countable, uncountable)A rapidly spreading fire, especially one occurring in a wildland area.
2. (countable, historical, uncountable)Greek fire.
3. (countable, uncountable)A spreading disease of the skin, particularly erysipelas.
4. (countable, figuratively, uncountable)Something that acts or spreads quickly and uncontrollably.

   “So, it appears a revolution has happened and a very unexpected one. Of course it was only a matter of time before it happened. With WiFi connectivity spreading faster than wildfire and a laptop or tablet in one’s bag, what’s the point of a mobile nowadays?”

   ““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.””