The point in which someone was once famous or well-known, has ceased being relevant in pop culture - leaving them only to be occasionally referenced to in obscure references or jokes, making them fodder for the "where are they now?" file

This usually follows subsequently after that famous person's final attempt at retaining relevance in the cultural spotlight fails miserably, also known as jumping the shark. This is especially true for one hit wonders.
The quintessential example of this would be Milli Vanilli. Once successful in the early 90's, it was later revealed that the music produced was not their own. After this revelation, the public ceased caring about the group; and they have opted to disappear from the public eye out of emasculated embarassment, thus their fade into obscurity.

Other examples are Spuds Mackenzie, Fred Durst, Vanilla Ice.
by DeusModus May 28, 2009
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A group of five words. They are all from the Indo-European English language, which diffused primarily from the growth of the British Empire, international jobs with this language, and it being a common trade language. This phrase specifically means that, supposedly a noun, has vanished or disappeared into the state of being unknown both literally and figuratively.
person 1: yo, what does watermelon sugar mean?
person 2: i don't know. it faded into obscurity after being banned by BOFA
person 1: huh?
person 2: BOFA DEEZ FUCKING NUTS IN YOUR MOUF
by Lurixx June 15, 2021
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