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
Irina	ee-REE-nah (Russian), EE-ree-nah (Finnish)	Russian, Bulgarian, Macedonian, Romanian, Finnish, Georgian
Somporn	-	Thai
Kimo	-	Hawaiian
Fuad	-	Arabic
Jiahao	-	Chinese
Siddhi	-	Indian, Marathi