Related Clues:
- ''It's so obvious!''
- Forehead-slapper's syllable
- 'Any idiot knows that!'
- ''Boy, am I stupid!''
- "Silly me!"
- 'Well, that's obvious'
- 'Gee, ya think?'
- "What an idiot I am!"
- "Obviously!"
- ''Obviously, Einstein!''
- 'Oh, of course!'
- ''Well, isn't it obvious?!?''
- 'Oh, yeah, really?'
- 'Ob-vi-ous-ly!'
- "How could I miss that?!"