system
A chat on subreddit /r/me_irl
human
Had a coworker once who said someone had 'cuckolded' him.  Turned out he thought it just meant 'tricked or made a fool of' and he had been using it like that for years.
gpt
I once learned the hard way a rim job was indeed not what I thought it was. At a car wash. That was interesting lol.