Related Clues:

• "Peachy keen!"
• Physicist's measure
• Cool, like a cat
• 'That's cool!'
• "Really cool!"
• "That's cool!"
• Unit at a reactor
• 'How cool!'
• Hardly squaresville
• 'Wowza!'
• Hiring and firing one
• Old-fashioned 'Sweet!'
• 'That's swell!'
• "Far out!"
• ''Sweet!''