O.N.Y.D oh no you didn't
It’s what you shout when someone does something so stupid it makes your brain want to quit.
Your dad says he bet your allowance on a game of rock paper scissors. You: 'O. N. Y. D oh no you didn't!'
Your best friend tells you they joined a rap battle and lost. You: 'O. N. Y. D oh no you didn’t!'
Your teacher says she let the class pet eat her homework. You: 'O. N. Y. D oh no you didn’t!'