Related Clues:

• OED listing
• Impassive one
• "Groovy!"
• Very good, in the 'hood
• 'Gnarly!'
• Hardly emotional
• Dict. information
• "Gnarly!"
• X-ray unit
• Far out!
• More than cool
• Fine in rap song,
• Unmoved
• 90's kids' catchword
• Cool, in 80’s slang