a segment of aging rock music that elicits longing or affection for the past, typically performed by an artist that has continued making music but is most associated with the era of their early or hit songs
Green Day's totally nostalgiacore now because I can only listen to their old stuff. Dookie makes me miss the '90s.
by mediapixel December 3, 2020
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by ComputerWorld February 4, 2024
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The childhood-crushing feeling you get when you realize how bad the shows you loved as a kid really are.
"I just watched Dinosaucers for the first time in years. I loved that show as I kid, but I couldn't even finish the episode it was such crap. Complete nostalgiacide. My childhood is ruined.
by Garignak December 13, 2014
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