Related Clues:

• Audible inhalation
• Starting-gate sound
• Subdued chuckle
• "That's funny!"
• Shot at the bar
• Show disdain
• Stable noise
• Contemptuous sound
• Nasal laugh
• Utter a harrumph
• Emulate a horse, in a way
• Noisy exhalation
• Bull sound
• Sound of a giggle
• Show scorn, in a way