Aussie slang. Started as people who were cooked ie: fried their brains (could be drugs, more commonly nowadays brainrot from conspiratorial internet influences) , extends to other situations and a euphemism for “fucked”

https://www.urbandictionary.com/define.php?term=cooked

UD is heavensent for people like me who have to use YT channels like Lessons in Meme Culture (LIMC) to keep up with the kids, but have typically no idea what the new slang means.

“Cooked” is Gen Z slang, basically means “done.”

• “This guy’s cooked.” (He’s had too much/he’s out of it/he’s screwed)

• “I’m cooked, chat.” (I’m out of options/it’s over for me)

In the context of this meme, which is from the movie Back to the Future, Marty is in the past and using slang that hasn’t entered popular use yet, so Doc thinks he’s talking about cooking food and is confused about what he means.

Also not to be confused with similar “Let them cook” (they’re onto something, let’s see where this goes).