Related Clues:

• "How stupid of me!"
• '-- darned!'
• Brow-slapper's syllable
• "The nerve!"
• 'Goodness me!'
• Word with a head slap
• 'Who doesn't know that?!'
• ''Well, don't that beat all!''
• "Man alive!"
• Slight reaction?
• ''Son of a gun!''
• ''I knew that!''
• 'Obviously'
• 'Good golly!'
• Affectedly genteel