Definition from Wiktionary, the free dictionary
- A humorous and lighthearted nonsense phrase indicating approval or mild excitement: okay, sure.
- A phrase meaning “great” or “that's remarkable”: wow.
1985, Marlene Fanta Shyer, Grandpa Ritz and the Luscious Lovelies, New York, N.Y.: Scribner, ISBN 978-0-684-18408-1, page 30:
- ‘It’s cool beans!’ That’s what Betsy always says when she thinks something is fantastic, and I couldn’t help wondering what she’d say if she could see me now.