Related Clues:

• Go 'Zzzz'
• Make noise while napping
• Bore any way but west
• Provide a little night music?
• Sound asleep!
• Go 'Honk shoo honk shoo'
• Dozer's noise?
• Zzzzzzz
• [Wake me when it's over]
• Saw logs, say
• Sound from a deep sleeper
• "Bo-ring!"
• "What a bore!"
• "Zzz" sound
• Extremely boring movie, say