I’m learning some of the newer ones as I go.
I get the vague meaning of UwU, I’d never heard of Poggers before.
Most of the slang from my time growing up (at least that I was exposed to) was just the advent of acronyms. BRB, LOL, ROLF, ROLFMOA, LMAO, NSFW, etc. Even I don’t know them all. Some got ridiculously long like 12 letters for a whole sentence.
Then we had stuff like L33t and epeen and pewpew.
Ones that are of newer generations that I’ve picked up is Yeet and Sus. I have actually come to say those in everyday conversation. I love the word Yeet for some reason, I even got a set of glass dice with gold numbers and the 20 is “YEET” and the 1 is the F word. I love them.