Related Clues:

• "Whap!"
• ''In the blink of an eye . . .''
• Relative of 'POW!'
• On-screen word in a 'Batman' episode
• "Right-in-the-kisser" sound
• 'Right in the kisser!' preceder
• Ka-boom!
• Comic book onomatopoeia
• Word in old ''Batman'' shows
• Batman sound effect
• "Thwack!"
• "Kaboom!"
• Cartoony exclamation
• Sound effect at a brawl
• Sound of a pound?