LENSA dan dOt Dot doT

First time i listen to Prof.David Crystal, i enjoy the listening about " Get a Life". I listen this topic two times because i can't catch up what they say first time. I understand what he said but when i read the transcript, I more understand what he said. In the transcript, I found some new words like jocular, derogatory and unfulfilling. Even there are some new words, I can understand what he talk about.