as ugly as sin
非常丑陋，極其難看
口語·夸張·形容非常難看
英文釋義
extremely unattractive
例句
That old building is as ugly as sin, but they plan to renovate it.
典故來源
源自基督教文化中“罪”被視為丑陋邪惡的象征，用其極端負面形象形容外貌丑陋。