Related Clues:

• Silly laugh
• Affected laughter
• Sound from the bull pen
• Bar shot
• Laugh nervously
• Bullpen sound
• Childish giggle
• Bull pen sound
• Sound that might accompany 37-Down
• Sound from 65-Across
• Make pig noises
• Sound of displeasure
• A high-pitched giggle
• Nervous or affected laugh
• A tittering laugh