tall story
noun (especially British English)(North American English usually tall tale)
a story that is difficult to believe because what it describes seems exaggerated and not likely to be true 无稽之谈；荒诞不经的故事 No one would believe such a tall story. 如此荒诞不经的故事没有人会相信。 Sounds like another one of his tall stories to me. 听起来他又在对我说些无稽之谈了。