Related Clues:

• Scornful sound
• 'Maybe'
• Unconvincing concurrence
• Sound of disbelief
• 'Sounds good to me'
• Skeptical grunt
• 'Why not?!'
• 'Works for me'
• 'Well, perhaps ...'
• "I don't think so!"
• 'If you say so'
• "Reckon so"
• 'Fine by me'
• "Maybe"
• "Sounds good"