Possible Clues:

• Alas, in Augsburg
• Oder exclamation
• Hamburger's cry
• Düsseldorf "darn it"
• Cologne "Crikey!"
• Cousin of 'verdammt'
• Bonn beef?
• Oskar's "Oh!"
• "Oh," in Osnabruck
• "Egad!" in Essen