cockamamie

He came up with a cockamamie excuse for being late, and nobody believed it.

他编了一个荒诞可笑的迟到借口，没人相信。

Don't listen to that cockamamie plan; it will never work.

别听那个荒谬的计划，它根本行不通。

The movie's plot is so cockamamie that I laughed through the whole thing.

这部电影的情节太荒唐了，我笑了一整场。