Slay

It's good. Use it in good situations like your friend got 100% on their test.

Person 1: "Guess what?"

Person 2: "What?"

Person 1: " I got 100% on the test! "
Person 2: "Slay! I wish I got 100%."
Person 1: "What does slay mean?"
Person 2: "It means it's good."

Person 1: "Thanks bestie!"

Person 2: "No problem."