Related Clues:

• 'That is so funny'
• 8-Down sound
• See 7-Down
• Joker's gibe
• 'Oh, very funny!'
• Rib-ticklers
• Loud laugh
• Routine responses?
• Laugh sounds
• 'Yeah, right'
• Sound of laughter
• Result of a crack?
• Laughs
• More than a tee-hee
• 'Very funny!'