expression, noun which may take the genitive case particle 'no'
much-talked-about; trending; in vogue
Describes something that is currently a hot topic among the general public or in the media. Often used as a prenominal modifier (〜の).
巷で話題のレストランに行ってみた。
I went to the restaurant that everyone's been talking about.
その映画は巷で話題になっている。
That movie is the talk of the town.
Compound of 巷 (ちまた, 'the streets; public') + で (locative particle) + 話題 (わだい, 'topic'). Literally 'a topic in the streets', meaning something widely discussed among people.