脏话比谎话干净千倍
[zàng huà bĭ huăng huà gān jìng qiān bèi]
This nickname implies that dirty words are a thousand times cleaner than lies. It reflects the idea that honest cursing, while not polite, is at least sincere, whereas lying is inherently deceitful and dirty. It expresses a preference for straightforwardness over dishonesty.