Related Clues:

• 'Coo-oo-ool!'
• Cool kin
• 'Coolio, daddy-o!'
• 'Pretty slick!'
• 'Aw gee, that's peachy keen!'
• Robotics company with a ''swell'' name
• Old-style ''Awesome!''
• Old-fashioned 'Cool!'
• 'Suh-weet!,' quaintly
• “Swell!”
• Radical cousin
• 'Swell'
• Robotic vacuum cleaner brand
• "Super cool!"
• “Holy moly!”