a crin
You yell 'crin' when someone says something stupid. They get pushed in the face. Say 'safety' if you think you're wrong to stop it.
He said the sky is green. I said 'crin' and pushed him. He fell over.
She claimed the moon is made of cheese. I yelled 'crin' and hit her. Classic.
He said pizza is a vegetable. I said 'crin' and shoved him. He looked confused.