noun
much talked about; creating a stir; the talk of the town
Describes a topic, person, or event that is widely discussed and causing public excitement or controversy. Often used in news or social media contexts.
彼の新曲は話題騒然だ。
His new song is the talk of the town.
そのスキャンダルで政界は話題騒然となった。
The scandal caused a stir in political circles.
Compound of 話題 (topic) and 騒然 (noisy, uproarious). The exact historical derivation is uncertain, but the combination naturally conveys a topic that is causing a commotion.