15-minutes Definition

noun
The very brief period of fame facetiously deemed to be allotted to each person in the modern age of telecommunications, broadcast news, etc.
Webster's New World

(short for "15 minutes of fame") A transient period of fame.

That singer's second single didn't chart; I guess his 15 minutes are almost up.
Wiktionary
Synonyms:
quarter-hour
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Origin of 15-minutes

  • From a statement by Andy Warhol that "In the future, everyone will be world-famous for 15 minutes."

    From Wiktionary