Related Clues:

• 'So cool!'
• "Excellent!"
• ''Like, stupendous!''
• White-knuckle
• "That's great!"
• 'Killer, dude!'
• Kick-ass
• 'Radical, dude!'
• Highly concentrated
• Strongly felt
• ''Very cool!''
• Impressive, to teens
• Inspiring fear
• "Totally cool!"
• Portentous