Related Clues:

• 'Groovy!', updated
• "Cool!"
• 'Far out, man!'
• Swell, to surfers
• Radioactivity unit
• "So cool!"
• "Way cool!"
• ''Cool!''
• ''Super!''
• Super cool
• Cool, to surfers
• Auto part
• Aptly titled 1980s BMX movie
• "Cool beans!"
• Radiator, for short