• Angry crowd sounds
• Bad audience response
• Catcalls
• Caterwauls
• Cries of derision
• Derisive cries
• Discouraging words
• Does owl impressions
• Evinces displeasure
• Expresses displeasure
• Hecklers' shouts
• Heckling sounds
• Imitates an owl
• Jeers
• Kin of Bronx cheers
• Laughfests
• Makes like an owl
• Matters of indifference, colloquially
• Night birds' calls
• Night calls
• Night noises
• Night sounds
• Nocturnal forest sounds
• Owl calls
• Owl comments
• Owl cries
• Owl on Sesame Street
• Owl sounds
• Owl's yowls
• Raspberries' cousins
• Raucous cries
• Relatives of raspberries
• Riots
• Says to-whoo
• Scornful cries
• Screech owls don't make them
• Signs of a hostile crowd
• Some night noises
• Sounds from the crowd at a concert
• Sounds from wise guys?
• Sounds like an owl
• Very funny happenings