Related Clues:

• "You should know better!"
• You should feel bad supporting artificial energy
• Reprimanding syllable
• "Bad boy!"
• "Naughty!" syllable
• Half an admonishment
• "I'm disappointed!"
• [Cluck]
• “For shame!”
• Non-drinker in fancy tutu having expression of disapproval
• Now, mummy, mummy!
• Click that is often doubled
• Clicking sound
• "I'm judging you"
• [How disappointing!]