Edwardian outburst

• Old oaths
• Old-timey "OMG!"
• "Oh, bother"
• Cry from Jeeves
• "Good grief!"?
• "My stars!"
• Old-time exclamation
• "Oh my heavens!"
• Old-school outburst

Wiktionary Word definitions in Wiktionary
interj. (alternative form of egad egad! English)