How to say boring not fun in Korean
Korean: 노잼[ no-jaem ]

Meaning
노잼 means “boring” or “not fun.” People use it in casual speech when a movie, game, class, joke, or situation is not interesting. It is slang, so it sounds natural with friends, but not in formal situations.
Example sentences
그 영화는 노잼이었어.
That movie was boring.
오늘 수업은 좀 노잼이었어.
Today’s class was a little boring.
그 이야기 또야? 노잼이야.
That story again? It's not fun at all.
비 오는 공원은 별 거 없어 노잼이야.
There’s nothing to do in the rainy park, so it’s boring.
