Related Clues:

• Stadium cry
• When repeated, a guitar effect
• Baby cry
• Certain holiday greeting
• Halloween cry
• Disapproving sound
• Scary word
• Ghostly sound
• Startling cry
• 'Do ___ Diddy Diddy' (1964 #1 hit)
• 'Yoo- --!'
•     Nursery noise
• Greet the bad guy
• Nursery output
• ___-ha (uproar)