Related Clues:

• "Awesome!" once
• Rock Against Drugs, for short
• "Far out!" in the 1980s
• "Cool, dude!"
• Wicked cool
• Way cool, in '80s slang
• 'Cool,' to a cool cat
• 'Groovy,' updated
• "Far out!" kin
• Ninja Turtles exclamation
• Kewl
• '60s "cool"
• 'Awesome!' in old slang
• Cool in deep space
• X-raying unit