I ought to wash your mouth out with soap!
Now I'm not one to swear. In fact, most of these words were unknown to me before watching this handy little educational video. Oh, did I mention it's in Korean? No? I'm sure you'll still find it useful because I have to agree with the professor: if you don't know what people are saying around (or to) you, then you run the risk of looking like a fool. So, watch and enjoy the free education.