Possible Clues:

• 'What's the ___?'
• "What's the __?"
• "What's the —?"
• 'What's the --?'
• "What's the ___?" ("So what?")
• 'What's the ___?' ('Who cares?')
• Subtraction amt.
• ''What's the __?''
• 'What's the ('Who cares?') --?'
• 'What's the __?'