Related Clues:

• Sodium hydride symbol
• 'Yeah ... you can just forget about it'
• "Don't think so!"
• 'Hmm ... I doubt that'
• "Hmm ... I doubt that"
• "I'm good, thanks"
• 'I'm good, thanks'
• Dismissive turndown
• 'I ain't interested'
• "No can do"
• 'Won't be doing that'
• 'Doubt it'
• Casual "Pass"
• Casual 'Pass'
• 'You might think so, but ...'