Related Clues:

• 'Who knows?!'
• ''Search me''
• ''How should I know?''
• 'Hell if I know'
• Unhelpful answer
• 'How should I know?'
• "No idea"
• 'Haven't the foggiest'
• [Shrug]
• "I dunno"
• "I'm stumped!"
• Words said with a shrug
• "Not a clue!"
• 'I dunno'
• "No clue"