Related Clues:

• The ___ Four (The Beatles)
• Quite marv
• "Super-duper!"
• Cool, in the '50s
• Beatles' descriptor
• ''Nifty!''
• 'Peachy keen!'
• "Swell"
• 'Way cool, man!'
• __ Four: Beatles
• Old-fashioned "cool"
• "Peachy keen!"
• 'That's cool!'
• "Really cool!"
• "That's cool!"