far-fetched
口语·形容故事或理由牵强、不可信
例句
His excuse for being late was so far-fetched that no one believed a word of it.
典故来源
源自16世纪，'far' 和 'fetched' 组合，原指从远方带来，后引申为牵强、不切实际，因难以令人信服。