I should coco - A British way of saying ‘I should think not’ but spelled lik

A British way of saying ‘I should think not’ but spelled like a dessert. It’s used when you’re tired of someone’s nonsense and don’t want to argue.

I should coco? You’re a mess and I’m done with you.

I should coco? You’re like a bad pizza.

I should coco? You’re not even worth my brainpower.