Related Clues:

• "Gee whiz!"
• "Excellent!"
• 'Way to go, dude!'
• X-ray dose unit
• 'Far out, man'
• 'Killer, dude!'
• 'Cool, man'
• 'Gotcha,' to a beatnik
• 'Wild!'
• ''Neat-o!''
• Totally dope
• ''Terrific,'' in '80s slang
• Awesome, in surf talk
• Totally cool, in '90s slang
• ''That's amazing!''