For me, it’s about people having to always point how something makes them so old that was popular in their childhood. And they never ever stop to point out to everyone and announce how old they are.
Like yes, we get it, time fucking moves forward. It is by design. What makes you so special out of the billions that came before you and the billions more that’ll come after you, about how old you are? It doesn’t make you special so shut up.
Maybe it’s a generational or regional thing. Kids at my school just openly accused eachother of being gay, “gay” was also used as an insult or derogatory term.
If someone called me sus, or referred to someone else as sus, I’d just be blunt and ask them “suspicious of what?” and force them to say it.