Related Clues:

• Race for hot rods
• ''Zzzzzz'' sound
• Concept in fluid dynamics
• [Bo-o-o-oring!]
• Force inhibiting progress
• Take forty winks
• Noisome noise
• Hint to a boring speaker
• Act that's 'contagious'
• Sleep loudly
• Critic's word for a boring show
• Snoozefest
• Aerodynamics challenge
• Buzzer-beating button
• It's contagious