Possible Clues:

• German's 'Oh my!'
• Weimar word of woe
• Berliner's 'D'oh!'
• Austrian's exclamation
• Complaint during a bad Herr day?
• Teutonic exclamation
• Otto's 'Oh!'
• 'Alas!,' in Austria
• Outburst in Osnabrück
• 'Scrubs' star Braff