Feeling nostalgia for something that came waaay before one’s time. This usually refers to people who like listening to music before the early 2000’s, and talking about this time as though they experienced it themselves, when in reality they were born decades after that era has long ended.
Person 1: “man, I love listening to Guns N’ Roses on cassette! You just can’t get the same feel from Spotify… I wish I could go back to the 80’s when shit was simpler”
Person 2: “dude, you were born in 2001, you only like cassette because you were too poor to afford an iPhone back in high school. You never experienced the 80’s, and your Secondhand Nostalgia is embarrassing.”