Related Clues:

• 'I'm drawing a blank'
• "I'm drawing a blank"
• 'Haven't the foggiest!'
• 'Wish I knew'
• "Wish I knew"
• I don't know (informal)
• “I’m drawing a blank”
• “Beats me!”
• Phrase represented online as ¯\_(''/)_/¯
• Haven't a clue! (informal)
• *shrug*
• 'Couldn't tell ya'
• 'I'm clueless'
• I've no idea (informal)
• "I haven't the faintest idea"