tall story
noun [ C usually singular ] mainly UK uk/ˌtɔːl ˈstɔː.ri/ us/ˌtɑːl ˈstɔːr.i/ (US usually tall tale)
荒诞的故事;令人难以置信的故事（或事实）
a story or fact that is difficult to believe
After dinner she told me a tall story about her pet. 晚饭后，她给我讲了一个听上去有些荒诞的故事，是关于她的宠物的。