Obvvz!
A way of saying you're so thick-headed you could be a brick wall and still have brain cells that are confused.
Obvvz! You're arguing with a calculator. It's not even broken. It's just being polite.
Obvvz! You said you'd stop eating candy. Now you're eating it while doing your math. What's next? You'll eat your textbook.
Obvvz! You called your dog 'fluffy'. It's not fluffy. It's more like a fuzzy mop.