Related Clues:

• "That's amazing!"
• Knock one's socks off
• "Awesome!"
• Exclamation
• 'Unbelievable!'
• "Holy smokes!"
• "Golly!"
• Knock ('em) dead
• Really impress
• Impress
• "No way!"
• 'You've gotta be kidding!'
• "I'm impressed!"
• 'I don't believe this!'
• "Amazing!"