nine-day wonder

Etymology
From. References to a period of nine days or nights to describe the length of a short-lived fad date from as early as the 14th century; see, for instance,  by the English poet  (c. 1340s – 1400; spelling modernized): “Ek [besides] wonder last but nine days never in town”.

Noun

 * 1)  Something that generates interest for a limited time and is then abandoned.

Translations

 * Finnish: hetken villitys
 * German:
 * Japanese: 人の噂も七十五日
 * Norwegian:
 * Bokmål:
 * Polish:
 * Portuguese: fogo de palha
 * Russian:
 * Spanish: