noun
festivities; merrymaking; carnival atmosphere
Refers to the lively, boisterous atmosphere of a festival, often with drinking, dancing, and noise. Can be used literally for a real festival or figuratively for any excited, chaotic celebration.
町は祭騒ぎでにぎわっていた。
The town was bustling with festivities.
優勝が決まって
When the victory was decided, the venue turned into a carnival atmosphere.