沸沸扬扬 (fèi fèi yáng yáng): bubbling and gurgling; hubbubing; abuzz

That tech company suddenly announced it was laying off half its staff. Once the news spread, there was a huge uproar inside and outside the company, and employees were all guessing who would be next.

Rumors that two celebrities had secretly married circulated wildly online for a whole week, and only after they personally denied it did everyone gradually quiet down.

The news that a garbage transfer station would be built in the neighborhood caused a heated uproar in the homeowners' chat group. Some supported it, some opposed it, and for several days the group was in a fierce quarrel.

After it was exposed that this restaurant used expired ingredients, discussion online was in a furor, the restaurant's business plummeted, and the owner had to publicly apologize.