Related Clues:

• In comics, it's represented by a string of Z's
• Soft palate resonance
• Boring event
• Nighttime noise
• Sound of z's
• Nasal noise
• Open wide, in a way
• Real bore
• Sleep sound
• Nap noisily
• Sound of sawing wood?
• Display of disinterest
• Cause someone's insomnia, maybe
• More men do this than women, studies show
• Nose noise