In recent years, emojis are becoming an increasingly important component of online communication. As Marcel Danesi (2016) has theorized, emojis can enter different relationships with different languages and cultures. Based on examples from Chinese social media, this paper explores how emojis are used in offensive online expressions from a semiotic perspective. The first part analyzes facial emojis that can convey offensive meanings by themselves. Drawing on Massimo Leone’s (2018) semiotic theory of the face, this part argues that these emojis are considered as offensive because of their emotional ambivalence. The second part probes into two types of frequently used animal emojis in offensive discourses. One type of animal emojis emphasize the nonhuman characteristics of the addressee, and the other type are usually replacements for natural-language words in Chinese Mandarin, dialects, and foreign languages. The third part discusses emojis that can refer to family members and points out the gender difference in these emojis. Whereas emojis of elder males are usually used self-referentially by the addresser, female emojis usually refer to the family members of the addressee. The results of this study reveal not only the social biases behind a new form of offensive online expression but also some of the unique relationships between emojis and the logographic system of Chinese characters.