system
A chat on subreddit /r/wallstreetbets
human
Things like this are why I fucking love urban dictionary. Whoever came up with the idea of a crowdsourced dictionary is a goddamn modern day prometheus. 
  
 UD is gonna be a big piece in how the AIs learn how to interpet our slang and sarcasm and tones and communicate with us, man

gpt
I would imagine that it already is being used in NLP. They could make a nice chunk of change if they made an api and charged for it.