The purposes of this study are to describe the usages and meanings of insulting expressions for women used in Korean cyber space, and to analyze the attitudes of netizens about those expressions. In section 2, we make a list of the insulting expressions and classify their types. The insulting expressions identified in this study are fifteen neologisms such as ‘Kim-yeosa’ (김여사, female bad driver), ‘Orc-nyeo’ (오크녀, ugly girl), ‘Doenjang-nyeo’ (된장녀, a woman full of vanity) etc. They are classified into four categories in terms of their referent, duration, presence of male counterpart, and the focus of insulting. In section 3, we explain the usages and meanings of some representative insulting expressions. ‘Kim-yeosa’, ‘Orc-nyeo’, ‘Gaettong-nyeo’ (개똥녀, a girl with no etiquette), and ‘Doenjang-nyeo’ are analyzed closely by focusing on their basic meaning, expanded meaning, and the usages of derivatives or related forms. In section 4, with a statistical method, we compare the attitudes of netizens about ‘Kim-yeosa’ and ‘Doenjang-nyeo’ which are frequently used for all women. In the process of this analysis, we can figure out the fact that many insulting expressions are used actively for women in Korean cyber space. In addition, it will be proved that the male and the female are quite different in their attitudes about ‘Doenjang-nyeo’.