Examples:

• If you think you're going to win the lottery without buying a ticket, you're living in Cloud Cuckooland.
• My boss thinks we can finish this project in a week, but that's living in Cloud Cuckooland.
• If you believe you can fly by flapping your arms, you're living in Cloud Cuckooland.
• If you think you can eat junk food all day and not gain weight, you're living in Cloud Cuckooland.
• My friend thinks she can become a famous singer overnight, but that's living in Cloud Cuckooland.
• If you think you can pass the exam without studying, you're living in Cloud Cuckooland.
• My coworker believes he can get a promotion without working hard, but that's living in Cloud Cuckooland.
• If you believe you can get rich quick without any effort, you're living in Cloud Cuckooland.
• My neighbor thinks he can win the marathon without training, but that's living in Cloud Cuckooland.
• If you think you can live without sleeping, you're living in Cloud Cuckooland.
• My relative thinks she can find a job without any qualifications, but that's living in Cloud Cuckooland.
• If you believe you can cure a serious illness with home remedies, you're living in Cloud Cuckooland.
• My friend thinks he can win an argument without any evidence, but that's living in Cloud Cuckooland.
• If you think you can get away with breaking the law, you're living in Cloud Cuckooland.
• My coworker believes he can succeed in business without taking any risks, but that's living in Cloud Cuckooland.
• If you believe you can build a house without any materials, you're living in Cloud Cuckooland.
• My relative thinks she can find true love by just sitting at home, but that's living in Cloud Cuckooland.
• If you think you can finish a book without reading it, you're living in Cloud Cuckooland.
• My friend believes he can become a professional athlete without any training, but that's living in Cloud Cuckooland.
• If you believe you can control the weather, you're definitely living in Cloud Cuckooland.