Use it to describe something that gets a lot of attention quickly but fades away just as fast.

Temporary hype

Often applies to trends or celebrities that briefly capture public interest.

Pop culture reference

The phrase is neutral; it doesn't blame the person or thing for not lasting.

Originally from mining, it refers to a brief excitement that doesn't result in discovery.

Use it when early signs suggest success but ultimately lead to disappointment.

Captures the excitement of a promising start that doesn't pan out.

Refers to something that seems successful at first but doesn't continue.

Suggests an abrupt end to what seemed like a promising venture.

Indicates that effort or interest wasn't sustained in the long run.