So I don’t usually set out to learn curse words, but there are types of Korean curse words that are easy to pick up on because of the use of “새끼” (sae-kki). This is usually added onto the end of some word which turns the meaning into something bad. Alone and in good context, “새끼” can just mean a young animal.
But added to other words, it has meanings like b*stard, SOB, MFer and a wide range of others. Needless to say, I hear my students (in my all boys middle school so you can imagine how common it is to hear words…I was young once too!) say these words all the time, and there always seems to be a new one I didn’t hear before. Hyo usually refuses to tell me any new ones, but she seemed very surprised that I knew quite a few lol.