Related Clues:

• Impress greatly
• "Impressive!"
• ''I'm amazed!''
• "Holy guacamole!"
• ''Holy smoke!''
• ''That's impressive!''
• ''Unbelievable!''
• '60s exclamation
• "That's unbelievable!"
• "I'm amazed!"
• 'Yowza!'
• Exclamation of amazement
• "That's incredible!"
• "Gee whiz!"
• ''That's really something!''