For me the concept applies to someone you just hate but unfortunately probably doesn’t even remember you exist.

For example I had a shit boss at my last job and I’m coming up on a year since I left. I can’t forget that guy. He probably forgot I even existed a couple days after I quit. I don’t forget though how much of a dick he was once you saw his true colors and I know the other 2 guys who both quit before me don’t either. Those guys tried warning me to find a job before I inevitably did something to set the guy off. Unfortunately I got to see it first hand and it was just baffling he had remained in business.

Yeah I kinda wonder, I know I was living in someone’s head rent free but Idk who they even were.

Earlier this year(I am over 2 years out of college) my alma mater lost in the NCAA March Madness tournament. I got a random text about how much my team suck and such. Well I didn’t have that number saved so I texted back, “Hey I do not have your number saved so you are talking shit to someone who did not even care enough to ever save your contact information. Also I graduated already and really don’t care anymore if they lost a basketball game.”