have bats in the belfry

• v. 发痴；异想天开

have bats in the belfry的用法和样例：

例句

用作动词 (v.)

1. You have got maggots in your brains.
   你真是异想天开！
2. No one in his right senses would believe such a fantastic story.
   任何有理性的人都不会相信这样异想天开的故事。