The talk of something
Definition 1 of 2
Pro Tip 1/3Time Sensitive
The phrase often denotes a recent event or a current trend that causes widespread discussion. 
After the award ceremony, that unexpected kiss was the talk of the celebrity world.
Pro Tip 2/3Not Always Positive
The phrase may imply both positive and negative conversations or speculations about something. 
The company's recall of defective products quickly became the talk of the industry.
Pro Tip 3/3Widespread Interest
It signifies that the subject is attracting attention from a broad audience, not just a select few. 
The restaurant's unique approach to fusion cuisine is the talk of the town this week.