flash in the pan
01
someone who experiences temporary success or achievement but ultimately fails to maintain it in the long term
Idiom
Informal
Exempel
She may have won that one tournament, but her career as a professional golfer was just a flash in the pan.
02
a sudden but brief success that is not sustained
Disapproving
Idiom
Exempel
The startup's viral app turned out to be a flash in the pan, fading within months.
