Related Clues:

• ''Outta sight!''
• 44-Across, updated
• 'So cool!'
• Old slangy word of enthusiasm
• "Excellent!"
• Remark of approval
• "Terrif!"
• "Super!"
• "Gee!"
• ''That's super!''
• ''Fantabulous!'' in the '50s
• 'Super cool!'
• "Super-duper!"
• Cool, in the '50s
• ''Nifty!''