"Really hate" is "짱시룸"(tchang-shi-rum) in Korean.
Words that were born from the conversation of two people in the KakaoTalk. After A was asked " Do you hate me?", B answered '짱시 룸 (Jjang si rum)'. This exchange is up on the Internet, it was decided to collect the popularity of other fans. Correct words, is originally '짱싫음'. This means that the foreign learners difficult to understand, but seems exquisite point where you are using the dare '움'.