Related Clues:

• 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
• Old-style ''Awesome!''
• '80s "way cool"
• 'Brilliant, dude!'
• 'Bodacious, bro!'