Related Clues:

• Antiquated euphemism
• 'Oh dear!'
• Cry of mock horror
• Word of mock horror
• 'Heavens!'
• Old-time oath
• 'That's incredible!'
• Major Hoople's outburst, in old comics
• Knock the socks off
• 'That's amazing!'
• Antiquated outburst
• Quaint outburst
• Astound
• Knock over
• Super-duper success