* The correct spelling is 멋있잖아. * verb stem + 잖아 : 잖아 is used to confirm the fact or correct the error to the listener. 잖아 is mostly used in speech not in written language. e.g. 내 방에 들어오지 말라고 했잖아. (I told you not to come into my room.) e.g. A : 오늘 왜 이렇게 길이 막히지? (Why is the traffic so heavy today?) B : 오늘 비가 오잖아. (Because it's rainy today.) e.g. A : BTS를 왜 좋아해? (Why do you like BTS?) B : 멋있잖아! (Because they are awesome!) Hope it helps and please follow me at koreanclass.canada on Instagram!