Related Clues:

• Sloppy-landing sound
• Kapow!
• Whack
• [Just like that!]
• Hammer sound
• Hitting sound
• [all of a sudden!]
• Wallop
• Big hit
• Sound
• Sound louder than kerplop
• One to remember, for short
• Comics sound
• 'Kapow!'
• Sound of a punch