O.N.Y.D oh no you didn't
It’s what you scream when someone does something so bad it makes you want to cry and throw a tantrum.
Your dad says he ran out of the house screaming at a cat. You: 'O. N. Y. D oh no you didn’t!'
Your mom says she tried to cook a meal and set the kitchen on fire. You: 'O. N. Y. D oh no you didn’t!'
Your brother says he told the principal he was a vampire. You: 'O. N. Y. D oh no you didn’t!'