Possible Clues:

• Pair on the Jumbo wasting seconds? Shame!
• Exclamation expressing annoyance
• 'You shouldn't have'
• Double cluck of reproach
• "Shame, shame!"
• "For shame"
• "Tut-tut" kin
• 'You should have known better'
• 'You should really know better!'
• Two chores reduced by a contemptuous remark