Related Clues:

• ''What's that?''
• 'What the ...?'
• "Excuse me?"
• 'Howzat again?'
• "How's that again?"
• 'You talkin' to me?'
• "What was that?"
• 'What'd you say?'
• Word from one who isn't following
• Clueless response
• "What's that?"
• 'How's that?'
• 'Wha'd ya say?'
• "What?!"
• Palindromic exclamation of disgust or surprise