Related Clues:

• Action that may be 'contagious'
• "Boring!"
• Wake others up while you sleep, perhaps
• Go 'zzz'
• 91 Across sound
• Bad thing to do in class
• [How boring]
• What seeing this answer may make you do (sorry, not sorry!)
• "B-o-r-i-n-g"
• Sign that one is spent
• Loudly snooze
• Apt rhyme for "bore"
• Sound from a sleeper
• ["You're still talking?"]
• Show your boredom or sleepiness