Super Simplified Version as explained to me by Discord buddy...Okay so I've seen this all over the place the last few days, I need someone to explain it to me. I don't understand the stock market at all, but from what I can gather a bunch of dudes on a subreddit decided to buy Gamestop stock...and that's a problem for like a hedge fund company that bet Gamestop stock wouldn't go up?
Reddit group saw Gamestop at a low price and thought it was undervalued so they bought a bunch. Hedge Fund Guy comes in, thinks Gamestop is going to tank so he short sales it (basically betting the opposite; saying it's going to drop in value rather than rise). But Hedge Fund Guy has a huge network of ways to get that message out so he basically starts trashing Gamestop in efforts to get it to just tank and crater so that he can make a bunch of money. Reddit guys are like "Oi, stop trying to tank our stock you jerkface". Hedge Fund Guy says no. Reddit now out of spite are buying a fuckton of Gamestop stock, making it rise in value exponentially (it went from $4 or so last year to $370 or so I think at around the highest).
Hedge Fund Guy is losing his ass because now he has to cover a lot more money with his short sale (so billions with a B kind of losses) while Reddit guys are sticking to boosting the price up.
TLDR; Wall Street bet that the stock would fall. Reddit out of spite is making it rise greatly, which is costing Wall Street a fuckton of money.