Among Us didn't invent the word, but it's definitely responsible for its explosion in popularity -- and now it's safe to say "sus" is legit because it has made its way onto Jeopardy!
Contestants were given this: "Slang adjective for someone you think is not what they seem, especially if they might be the imposter in the game Among Us."
"Sus," in case you haven't heard it, is shortening the word suspect or suspicious.
Jeopardy! contestant Mattea, by the way, got "sus" correctly with no problem.