Related Clues:

• 'Far out, dude!'
• Very cool
• Epic
• Causing wonder
• Remarkable
• ''Awesome!''
• '90s kids' shout
• 'Groovy!', updated
• "Cool!"
• 'Far out, man!'
• Socko
• Swell, to surfers
• Radioactivity unit
• "So cool!"
• "Way cool!"