Facrayski
Facrayski means you're so crazy it's like your brain is on fire and your soul is doing backflips. People use it when you're being a total goofball or when you're so shocking it feels like someone just screamed in your ear.
You: I turned my dog into a wizard. Me: Facrayski!
My friend ate a whole pizza in one bite. I yelled, 'You're facrayski!'
My teacher said I failed math. I said, 'That's facrayski!'