MEME REFERENCE

For Christmas I Want a Dragon

Use when an impossible wish is treated as easier to grant than a supposedly realistic but extraordinarily unlikely request.

What it expresses: The fallback to fantasy exposes how hopeless the original demand sounds.
Example: A friend asks for a cheap apartment beside the office, and you reply, 'What color dragon would you like?'
When not to use it: The practical request is readily available within budget; replacing it with fantasy would not reveal impossibility.