Related Clues:

• "I'm stumped!"
• Words said with a shrug
• '[shrug]'
• Verbal shrug
• "Got me"
• 'No clue!'
• "Search me"
• "Haven't the foggiest"
• ''No idea''
• ''I'm at a loss''
• "Ain't got a clue!"
• Words accompanying a shrug
• 'Can't say'
• Verbal equivalent of a shrug
• Unhelpful reply