Related Clues:

• "Like, no-brainer!"
• 'I am so stupid!'
• 'I would have thought it was obvious'
• 'That is so obvious!'
• 'Obviously ...'
• 'Ya think?'
• Sound often heard after a slap
• [Forehead slap]
• 'Thank you, Captain Obvious!'
• ''C'mon, that's too easy!''
• ''Silly me!''
• "Well, of course!"
• 'Uh, yeah!'
• 'That's obvious!'
• 'I *finally* got it!'