Obviomity
When you blurt out something so obvious it makes everyone else look stupid.
'Duh, it's 2 AM and you're still awake? You're a monster!'
'You're wearing a shirt that says 'I ♥ Pizza' and you're eating pizza? What is this, magic?'
'You’re arguing about the color of the sky, and it’s clearly blue. Are you both blind?'
xs