O.N.Y.D oh no you didn't
You yell this when someone does something so bad it makes you want to punch them and then cry.
Your friend says they told the school that you were a robot. You: 'O. N. Y. D oh no you didn’t!'
Your sister says she tried to ride a bike without training wheels and fell. You: 'O. N. Y. D oh no you didn’t!'
Your brother says he told the teacher he had a pet dragon. You: 'O. N. Y. D oh no you didn’t!'