Related Clues:

• "Fargo" affirmative
• Holler partner
• 'Give a --, don't pollute'
• 'Boo- --!'
• Sound of reproof
• Owl call
• Owl's sound
• Hilarious sort
• Amusing antic
• "Boo" follower, in a triumphant shout
• The least bit of concern
• Cry of disapproval
• Nighttime bird call
• Yes, in "Fargo"
• Owl's utterance