"Awesome!"

RAD

Think of a slang term from the '80s and '90s that means "cool" or "excellent," often used to describe something impressive.

"Awesome!" is a common exclamation of excitement or approval, and "RAD" is a slang term that fits perfectly as a short, punchy synonym. The word "rad" emerged in the 1980s and 90s as surf and skate culture slang for something cool or impressive, making it a natural match for the clue. It’s a straightforward definition with no hidden wordplay—just a direct, informal way to say something is awesome.