Related Clues:

• Colloquial yes
• 'Boo- --!'
• "Boo" follower, in a triumphant shout
• Derisive call
• Yes, in "Fargo"
• Yes, gruffly
• Yup
• Exclamation of impatience
• Oft-repeated word in "Fargo"
• "Fargo" word that rhymes with 25-Across
• 'Fargo' affirmative
• Disdainful cry
• Folksy-sounding approval
• Yes in "Fargo"
• Impatient snort