Related Clues:

• “Far out!” in dated slang
• Unit akin to the roentgen
• "Super cool"
• 'Stellar!'
• "Gee whiz, that's cool!"
• “Peachy!”
• "How groovy"
• Pretty rad
• "Sick!"
• "Kewl!"
• "Cool beans"
• "Cool, man"
• Groovetastic
• Fine US broadcaster in need of satellite
• 'Totally rockin''