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When someone acts like they're smarter than everyone else by throwing around old, boring stuff no one cares about just to make themselves look cool and everyone else look stupid.
My cousin talked about a 1970s TV show no one knows about. I asked if it was still on. He said, 'It was on once, and that was enough.'
My teacher called the 1980s a 'lost decade' and then made us write an essay about it. I wrote 'It was a decade. It was lost. What's the point?'
My friend said 'It’s like the 1960s, but worse.' I said, 'You don’t know what the 1960s were like.' He said, 'I don’t care.'