Related Clues:

• Wicked cool
• Way cool, in '80s slang
• 'Groovy,' updated
• "Far out!" kin
• Ninja Turtles exclamation
• Kewl
• 'Awesome!' in old slang
• X-raying unit
• Neato kin, later
• Cool kin
• Retro-remarkable
• Cool, retro
• "Far out," later
• 'Sick, dude!'
• Aptly titled '80s film about BMX racing