I know not
A sarcastic way of saying you're mocking someone for saying something dumb. Usually said by a Philly kid who thinks they're the smartest person in the room.
"I KNAANOT THAT YOU'RE DUMB!" (said by a Philly kid who was annoyed by someone else's dumb comment.)
"I KNAANOT THAT YOU'RE DUMB AGAIN!" (said by a Philly kid who had to hear the same dumb comment for the third time.)
"I KNAANOT THAT YOU'RE DUMB, BUT I KNOW NOT THAT YOU'RE SMART!" (said by a Philly kid who was confused by someone's dumb comment.)