Related Clues:

• Sounds as if it's not on approval
• Coming at the double, this would express disapproval
• "Mustn't do that!"
• 'You ought to be ashamed!'
• Reproachful cluck
• Terse reproach
• 'Ba-a-ad!'
• Rebuke an Egyptian king, and his twin
• 'You know better!'
• Cluck of reproach
• Mummy, mummy, naughty naughty!
• Naughty, naughty!
• Mild exclamation of disapproval
• Sound of mild disapproval
• "How naughty of you!"