noun
Describes a state of wild excitement or fervor, often about a trend, event, or person. The suffix ぶり emphasizes the manner or degree of the enthusiasm.
新作ゲームの発売日の熱狂ぶりはすごかった。
The frenzy on the release day of the new game was incredible.
彼の熱狂ぶりを見て、本当にその歌手が好きなんだと分かった。
Seeing his enthusiasm, I realized he really loves that singer.
熱狂 is the base noun meaning 'wild enthusiasm' or 'frenzy'; 熱狂ぶり adds the suffix ぶり to focus on the observable state or manner of that enthusiasm.
Compound of 熱狂 (wild enthusiasm) and the suffix ぶり (manner, state). The suffix ぶり attaches to nouns to describe the way something is done or the state of something.