One Cuil = One level of abstraction away from the reality of a situation.
Example: You ask me for a cat.
One Cuil: If you asked me for a cat and I gave you a rhino.
Two Cuil: If you asked me for a cat, but it turns out I don't really exist. In the place where you perceived me to be standing is a picture of a large cat. On it's collar are the words: "I am a large rhino."
Three Cuil: You are a cat. You begin to scream, only to realise that you are meowing. You scratch just under your ears and begin to purr.
Four Cuil: Why are we wearing dinosaur outfits? A light breezes rolls over our bodies but you only have one arm. Suddenly, the wind begins to howl and an alternative universe is created where we are dinosaurs wearing human outfits. I have cats for arms, and as you notice this you meow again.
Five Cuil: You ask for a cat; and I give you a cat. Your pull it to your chest and begin to pet it. Your nose begins to run and you wipe it on the cats tail. On the other side of the world a bank is robbed by a woman who has 7 sisters. In her wallet is a picture of you, in your human form. Your ears are pierced in this picture and they were in your human form as well, but something is different about them. The cat purrs and grabs a hold of your earring, ripping it from your ear. Milk drips out of you wound and the lady robbing the bank is arrested. Her oldest sister is climaxing while having *** with my brother. I give you a cat and it is poisonous. I am dead.
Six Cuil: You ask me for a cat. Mark Whalberg tells me he will not **** and he hands me a cat. The cat is smoking a cigarette, I develop liver cancer. I die. The wind blows on you again and the cat does not have a left rear leg. It puts its cigarette out on my eye. MGMT plays softly and you meow to the moon which is a pizza. The pizza has olives on it which displeases you. Your displeasure causes the woman to rob the bank so she can buy you Hawaiian pizza. The gravitational pull of the olives causes a flood to reach your house. You cry and your tears become lakes. The Earth is flooded. Uranus ignites suddenly, engulfing Neptune in flames. A civilization of Nicolas Cage's living there are destroyed. Obi Wan says that there has been a disturbance in the force. A cat hands you me.
It's too late to be thinking.