Korean Slang and Colloquial Expressions is a hybrid language learning book by which Non-Koreans can learn Korean and Koreans can learn English! It provides the readers with the most commonly used Korean words and expressions such as oddball(4차원), freak(덕후), miser(짠돌이), pushover(호구), outcast(왕따) and etc., in English. Video lectures produced by the author can be viewed on YouTube and Podcast sites. Search for "Korean Slang and Colloquial Expressions" on YouTube or any Podcast apps. Non-Koreans can learn colloquial Korean expressions and Koreans can learn how to translate Korean expressions to English smoothly and precisely.