Related Clues:

• Make noise in bed
• Produce Zs
• Sleep interruption
• In comics, it's represented by a string of Z's
• Sot's shot
• Soft palate resonance
• Quick drink of booze
• Hog sound
• Boring event
• Stallion's sound
• Bull's sound
• Nighttime noise
• Sound of disdain
• Sound of z's
• Contemptuous exhalation