Babakazoowie
A big, crazy scream you let out when someone says something so dumb it makes you want to cry.
Friend: 'I think the sky is made of cake.' Me: 'Babakazoowie!'
Bro: 'I ate a whole cake for breakfast.' Me: 'Babakazoowie!'
Dog: 'I think the sun is made of spaghetti.' Me: 'Babakazoowie!'