The use of the Internet has become an indispensable part of life in the new millennium. One of the most popular activities in the era of the Internet is online communication. Net-Lingo, which is a product of online communication, is a new language variety that differs from both writing and speech as traditionally understood (Crystal 2001). Given that Net-Lingo is considered as a language variety, I describe the prominent linguistic characteristics of Korean Net-Lingo (KNL) from the morphological domain and investigate the specific mechanisms underlying the observable linguistic characteristics.The globalization of the Internet is urging different languages to contact in online communication, especially English as the globally leading language. Based on the description and linguistic analysis, I also examine the impact of English on KNL.I envision an inevitable, vigorous interaction between English and Korean. Therefore, this study will add insights to research on a new type of language contact.