I know not
A loud and proud way of saying you totally get what the other person is saying. Usually said when you're trying to show off how smart you are.
"I KNOW NOT WHAT YOU MEAN? I KNOW NOT WHAT YOU MEAN? I KNOW NOT WHAT YOU MEAN!" (said by a kid who thinks they're the smartest in class.)
"I KNOW NOT THAT YOU SAID THAT? I KNOW NOT THAT YOU SAID THAT!" (said by a kid who heard the same thing twice.)
"I KNOW NOT THAT YOU’RE TRYING TO CONFUSE ME!" (said by a kid who got confused by a simple sentence.)