Related Clues:

• “Far out!” in dated slang
• Unit akin to the roentgen
• "Super cool"
• "That's impressive!"
• 'Stellar!'
• 'That's mind-blowing'
• "Mind. Blown."
• "Sick!"
• "Wild, man!"
• "Kewl!"
• Continue performing with Diamond
• 'Well, that's a surprise'
• "Cool, man"
• Apt cry of encouragement for a geologist?
• Groovetastic