Related Clues:

• "That's cool!"
• Unit at a reactor
• 'How cool!'
• 'Wowza!'
• Old-fashioned 'Sweet!'
• 'That's swell!'
• "Totally cool!"
• Top cop
• "Far out!"
• ''Sweet!''
• Portentous
• Really cool
• X-ray spec?
• 'Lovely!,' in dated slang
• 'Like, totally cool!'