Related Clues:

• "Awesome!" '80s style
• ''Way cool!''
• ''Neato!''
• 'Way cool!'
• 'Way out!'
• 'Excellent!'
• Far out
• Brilliant
• 'Cool, dude!'
• "Sweet!"
• Cooler than cool
• Swell, '90s-style
• "Awesome!"
• X-ray dose
• Physicist's unit