Related Clues:

• 'That is so funny'
• 'Uh-huh'
• 8-Down sound
• Slangy approval
• See 7-Down
• Joker's gibe
• 'Oh, very funny!'
• Loud laugh
• Laugh sounds
• See 12-Down
• 'Yeah, right'
• Sound of laughter
• Result of a crack?
• Laughs
• 'You betcha!'