15-minutes-of-fame Definition

noun

(idiomatic) A very short time in the spotlight or brief flurry with fame, after which the person or subject involved is quickly forgotten.

The barbershop quartet Homer put together had its 15 minutes of fame before fans simply lost interest.

Wiktionary

Origin of 15-minutes-of-fame

1968, Andy Warhol, in a catalogue of an exhibition of his art in Stockholm

From Wiktionary