Related Clues:

• '90s kids' shout
• 'Groovy!', updated
• Like jazz musicians
• "Cool!"
• 'Far out, man!'
• Swell, to surfers
• Mary-Kate, to Ashley
• Word in a cadence
• Radioactivity unit
• "So cool!"
• Like a jazz cat
• "Way cool!"
• ''Cool!''
• ''Super!''
• Super cool