Related Clues:

• Boring movie
• Saw wood, so to speak
• Be affected by a blocked airway
• Sleep noisily
• Sound from one faking boredom
• Dagwood's ''SKNXX-X!''
• Occurrence at many a lecture
• Night sound
• Nocturnal sound
• Show ennui
• Midnight rumble
• Bedtime indicator
• Nocturnal annoyance, perhaps
• Sound caused by the soft palate's vibration
• Sound made while sacked out