Related Clues:

• "Wish I knew"
• “I’m drawing a blank”
• “Beats me!”
• Phrase represented online as ¯\_(''/)_/¯
• *shrug*
• 'I'm clueless'
• "Got me!"
• 'I wouldn't know'
• *Shrug*
• "Heck if I know"
• "I'm baffled!"