It isn't necessarily what you do, like it became cool for people to call themselves geeks or nerds because they bought a fukking smart phone
or play video games...nah.
Real geeks and nerds are part of a subculture, and most of their habits are exclusive to a very type.
If you play video games, and that is your only "geek" trait, you are a regular person.
If you like trivia, enjoyed "Carmen San Diego" video games back in the 90s, like cosplay, keep a display case of childhood toys, play card games and get
into heated debates about why "Giants can in fact beat dragons" and you derive fun from that? You are likely a geek.
If you got this, you either are like

or

That type of shyt will make me laugh. Real geek shyt