a nine-day wonder

a nine/one/seven-day wonder

someone or something that causes interest or excitement for a short period but is then quickly forgotten His music was derided by an older generation convinced that he was a nine-day wonder.

Common Names:

Name	Pronounced	Usage
Heino	HIE-no (German), HAY-no (Finnish)	German, Dutch, Danish, Finnish, Estonian
Alden	AWL-dən	English
Shelby	SHEL-bee	English
Ethel	ETH-əl	English
Maximilienne	-	French
Lazer	-	Yiddish