Related Clues:

• Horsey laugh
• Do a line of
• Jiggerful
• Sound akin to 'Harrumph!'
• Sound from the bull pen
• Bar shot
• Bullpen sound
• Bull pen sound
• Sound that might accompany 37-Down
• Sound from 65-Across
• Make pig noises
• Sound of displeasure
• Rough nasal sound of disgust or anger
• Bullish comment?
• Stifled laugh