snug as a bug in a rug
温暖舒适，安全舒适
口语·形容舒适惬意
英文释义
very comfortable and cozy
例句
After a hot bath and a blanket, I felt snug as a bug in a rug.
典故来源
18世纪英国谚语，用虫子蜷缩在毯子里的形象比喻极度舒适温暖。