Related Clues:

• Far out!
• "Wow!"
• More than cool
• Bang-up
• 90's kids' catchword
• In good order
• 'Peachy!'
• 'Sounds swell!'
• 'Snazzy!'
• "Swell!"
• 'Cool'
• Unit of 100 ergs per gram
• Word of approval
• Straight, at the bar
• 'Out of sight!'