Can we make a like community dictionary megathread or something?

Recently in another post, I was chatting with a fellow redditer about this. I feel like there's so many in jokes/references that fly over my head sometimes because I didn't really join boycott communities until a bit later or was offline for a day or two. when i first started reading stuff it took me forever to figure out what CDGs were 😅 I have to admit it took me awhile to start posting because I kept feeling like I didn't understand half the things people were saying or referencing, and it sort of felt like i was an outsider to the community. i feel like a thread of definitions or explanations of all the references and in jokes would be helpful for people who've missed things but i have no clue how reddit works or how something like that would be made.

Things I didn't understand when I first joined:

-CDG

-Ursula

-50/90

-hopium/copium (i didn't know what the difference was at first)

-the centipede as an LI? (still don't know this one 😅)

-&more that i can't think of at the moment