Related Clues:

• Awesome
• 'Totally cool!'
• 'That's awesome!'
• 'Groovy!'
• 'Swell!'
• 'I'm impressed!'
• 'Rad!'
• ''Great!''
• ''Peachy-keen!''
• Totally awesome
• “Far out, man”
• Way cool
• ''Far out!'' to a physicist?
• 'Nifty!'
• Circle meas.