Related Clues:

• Three above the 3
• Unmoved one
• Cool, in slang
• Excellent, in 80's-90's slang
• Rock's --- Leppard
• Philosophical
• 'Cool, dude!'
• "Sweet!"
• Cooler than cool
• Swell, '90s-style
• "Awesome!"
• X-ray dose
• Physicist's unit
• Gnarly
• Meaning, in a dict.