The idea that using the shiny new graphing calculator is cheating.
Pagers, jokes about being a drug dealer.
Blowing into video game cartridges.
There was a black and white device called a newspaper that would be delivered to your house, sometimes by a child on a bicycle. It had all sorts of stuff smashed together, like news, stock prices, lame comics, sports stats, advice columns, political editorials, crossword puzzles and advertisements/coupons, etc.
I remember when pog mania was a thing. I still have a hundred or so in tubes and plastic sleeve books.
Tamagotchi eggs you carried around and fiddled with during class.
Movie piracy meant renting the movie from a brick and mortar store and recording it onto another VHS tape and keeping the copy. This required two VHS players and it wasn’t as simple as just copy pasting. You actually had to play the movie and record the entire thing start to finish in real time.
Speaking of video rental, it was some time before I realized what my parents were doing when they went into the back of the store behind the curtain and rented those nondescript beige boxes with no title or artwork. No clue what I thought they were doing at the time – boring grownup stuff, I guess.
And speaking of which, many guys had a physical porn stash that was more hidden than the bat cave. With actual tapes and magazines. The lazy guys just kept the mags under their mattress. Guys would commiserate when their girlfriends found it against all odds.
The first time a guy brought a titty mag to show the group was an epochal event, like Moses bringing down the 10 commandments. Nowadays kids don’t have to work for their smut. It’s way too easy and they probably don’t appreciate it like we did. Up hill, both ways, in the snow, etc.