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The Kai Smile is when you’re grinning like a madman who just peed on the floor. It’s not happy. It’s scary. It’s like your face is trying to tell everyone you’re one bad day away from a straitjacket.
My mom gave me the Kai Smile when she saw my report card.
He gave me the Kai Smile right before he bit into a whole pizza.
She walked in with the Kai Smile and immediately started talking to the ceiling.