Related Clues:

• Break down
• See 58-Across
• Burst into laughter
• Disintegration
• Not just laugh
• Bust out laughing
• Blow a practical joke, maybe
• Bust a gut
• Have a nervous breakdown
• Expert before the judge seen to go to pieces
• Break apart; burst out laughing
• Laugh a lot, or quarrel, when sailor butts in?
• Collapse under strain; praise
• Fail to laugh out loud?
• Burst out laughing