Related Clues:

• Very cool
• Epic
• ''Awesome!''
• '90s kids' shout
• Hippie's phrase
• 'Groovy!', updated
• "Cool!"
• 'Far out, man!'
• "Incredible!"
• Swell, to surfers
• Radioactivity unit
• "So cool!"
• Avant-garde
• "Way cool!"
• ''Cool!''