system
A chat on subreddit /r/me_irl
human
Every generations slang is "cringey af"
gpt
I would argue some is, and some isn't. Many make it into common language and never seem to leave

90's

"All that and a bag of chips" is embarrassing

"Blazed" is still good

80s

"Chill" still used and is incorporated into a modern slang "Netflix and chill"

"Cowabunga" to actually say this.... sheesh only Michaelangelo (TmnT) can get away with it now


70's 

"Dude" has stuck around

"Freaky deaky" not so much 


I would say for the modern day ones

"Bussin" is stupid

"Cringe" this one is sticking around

Oh and as an addition, I find it funny that some people think "lowkey" is modern when I've heard this back when I was a kid in the 90's. Probably is older than that.