From The Collaborative International Dictionary of English v.0.48:
furor \furor\ n. an interest followed with exaggerated zeal; a fad.
Syn: fad, craze, furore, cult, rage. [WordNet 1.5]
2. a sudden outburst (as of protest).
Syn: uproar, furore. [WordNet 1.5]
From The Collaborative International Dictionary of English v.0.48:
furore \fu*ro"re\, n. [It.] Excitement; commotion; enthusiasm. [Also spelled furor.] [1913 Webster]